Javascript Change Width Of Div Dynamically

So now I want adding div s,removing div s and remaining div 's contents, but the code I wrote is not working in such a way. the height is set to. innerHTML on that), and for each of them you need to change the height of the element. You want to change the document structure dynamically. Once created, you can insert (or add) the element to your web page, or add it to a pre-defined element or a dynamically created element. A change in box-sizing for CSS purposes may break such JavaScript. First, CSS width/height depend on another property: box-sizing that defines "what is" CSS width and height. This article is an overview of some powerful, fundamental DOM level 1 methods and how to use them from JavaScript. Since there is no answers for a while, and I am closing to the deadline, so I use a quick and dirty way: add a image line (height = 1px, white), from control the image width I can control the table size. I didn't know the height of the content and the textarea element doesn't resize naturally like other HTML elements, so I needed to update the height of the element with JavaScript each time the content changed. I am using this following code: getElementById('div_register'). Here is a simple script that provide real time change of font size along with font family, size, style and color. In html I've one div and three input fields, which sets div's height width and color. We will use a few lines of JavaScript code to resize the div elements so that they share the same height on the page. Normally, a cell takes up the space it needs to display the content. A recent search turned up advice about how to use JavaScript in a Web Part, how to use it to customize the ribbon, and how to use it in custom application pages. It sets the height/width of the area inside the padding, border, and margin of the element. NET Forums / General ASP. Perhaps you want to provide theme support for your site. I know that iframes have been beaten to death on this site as well as others. JavaScript. Recently I ran across the requirement of needing to size a div tag around a table in order to have it scroll and space correctly. The number of rows in the table change so I needed to shrink the div around the table. Convert a div into an image using jquery/Javascript how to add div when click on button using jquery ? Jquery function doesn't works for a dynamically created div element. Supported in all browsers. In this code I am not able to set centerBox DIV according to my requirement. Can you change width and height of TinyMCE. *Tek-Tips's functionality depends on members receiving e-mail. like when i add any row to the GridView the popup size should be automatically increased, similarly after deletion of row the size of the popup should be shrink. Often in the world of dynamic data we find ourselves with data that is larger than the container. Hi, I’m currently trying to learn Javascript and I already have my first question. The width() method sets or returns the width of the selected elements. Dynamically applying CSS based on browser's resolution yaneshtyagi Tech December 2, 2008 3 Minutes Sometimes we need to change the layout of the page based on the resolution of the client machine or browser. Requirement #1: A scrollable view with fixed header and footer with 50px of height ( should work for multiple resolutions ). So u suggest to get height of div with content on change and then set height property on window? March 13, 2013 at 5:43 pm Change window size dynamically with option resizable false #16997 Peter Stoev. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML. I want to dynamically set the height and width of an image using javascript so that the image looks proportionally fine according to different screen resolutions. But the height is not giving me the same behaviour, the height of the div expands to fit whatever content. I have a text-field with three drop-down menus,with options to change the font style, font type, and font size. A recent search turned up advice about how to use JavaScript in a Web Part, how to use it to customize the ribbon, and how to use it in custom application pages. Among the many talents of the DOM is its ability to retrieve and modify attributes inside HTML elements. I gave the div a width and height and using the var() function set its background color to the value of the –background custom property. Not necessarily a good idea. Instead of having. Increase and Decrease font size using jQuery: This tutorial explains how to increase and decrease font size of text content in a div dynamically using jquery. As you'll see in my HTML below, there is an id called "section1″. Here is a simple script that provide real time change of font size along with font family, size, style and color. Even though I'm not a big fan of JavaScript I've found it often comes in handy. See also the inevitable. How to dynamically add content to a div and store the content to a cookie via JavaScript This is an example of adding dynamic content via JavaScript by allowing the user type in the actual content. Demo Change Font Color JavaScript Red color yellow color green color blue color. Generating random numbers is a common question found on many forum sites. Second, CSS width/height may be auto, for instance for an inline element:. Net, JavaScript. Surface devices. It's very easy. The first goal is to show you how to generate a dynamic HTML table, rows, and cells. JavaScript - Change Div Background Using Javascript - Free JavaScript Tutorials, Help, Tips, Tricks, and More. How can I change the height and width of an element with Javascript? I have tried and so far I can only change. Possible applications are: A constantly updated clock or countdown timer. Flexible table width Often you may want to have your table resize dynamically with the page. When you have to add an element you need to display the element one by one and for removing hide them. But this can be extended further to fo the javascript magic 🙂 Well in this you will learn how to change the class of any element dynamically on an event. Next, we'll dynamically alter the width and height of the div to equal that of the viewport. The DOM methods presented here are not specific to HTML; they also apply to XML. Unfortunately Charts width and height are not changed according to the browser window size. You might want to use it as part of a web application -- it contains all you need for a lightweight "windowing" system. Simple Way To Set The Height/Width Dynamically Using CSS While working on the HTML designs, I came across some of the design issues that I would like to share them along with the solutions. So say if width of the contents inside the div is 400 px then the width of div should be 400px, and also if it exceeds 600px the width should not increase beyond 600, but a horizontal scrollbar should come. Here is a simple script that provide real time change of font size along with font family, size, style and color. I would like to be able to change the style within a CSS class using JavaScript. The resize event is sent to the window element when the size of the browser window changes:. JavaScript - Resizing A Div By Mouse Drag - Free JavaScript Tutorials, Help, Tips, Tricks, and More. How to create a multiple div inside existing div in ASP create Div inside a div Dynamically create multiple divs inside a div from code behind using for loops or appendchild property?. width = ($. still eager to hear if anyone has a solution for this… how can I set the bottom align of one div to the bottom align of another? i am open to using javascript, if need be, or tables [cough] if this is the only solution…? but currenrtly i am still hoping for a smart div/css solution. The overflow-y: hidden; allows the margin of the slide to hide all the sliders that cannot fit into the current width of the box. It's very simple and quick to create form dynamically with dynamic form builder. The media and type of the style may or may not be given. Typically this is done by assigning width:100% in your CSS, but this presents a problem for Javascript since it can be very hard to get that relative size rather than the absolute pixels. If the width and / or height change after the grid is initialised, the grid will automatically resize to fill the new area. net and tagged Create Div Dynamically In HTML, How to Create DIV Dynamically using JavaScript, how to create div tag using javascript, How to create div using javascript on May 22, 2014 by Mandeep Singh. In the meantime, I'm trying to figure out the best way to dynamically change the grid's width as I expand the section wrapped around it. Any help is appreciated. I feel like this is what you are going for. like, if i remove or hide right div, left div width should 100% dynamically with javascrpt. Change font color by style of id of tag with color attribute in javascript. It's very easy. I am viewing this in Firefox and the result is that the div resizes perfectly if I have my window mazimised, but it falls a little short of the full height as soon as a make the window smaller. NET Online: 962. Applying height and width attributes to the specified div using CSS will accomplish the same thing which I did not add to keep the javascript simple. The width() method sets or returns the width of the selected elements. It's very simple and quick to create form dynamically with dynamic form builder. Adding table rows : 9. Div 2 Content This is a JavaScript library that lets you easily implement user-friendly and customisable dragging and resizing of your page elements. When this method is used to set width, it sets the width of ALL matched elements. so my problem is that I want to find a way of using canvas tags that are created at runtime. I believe I can just restrict that in CSS, and use Javascript to handle the resizing of the DIV. I am using the onclick event which is fired when the div is clicked. Post navigation. width=500; but this line of code isn't Stack Overflow. This article describes how to change the size of textbox at run time using jQuery. innerHTML on that), and for each of them you need to change the height of the element. So say if width of the contents inside the div is 400 px then the width of div should be 400px, and also if it exceeds 600px the width should not increase beyond 600, but a horizontal scrollbar should come. Ah the fun of standards 🙂 standards polatics makes real elections seem tame like a vicars tea party. All CSS dynamic. I would like to know how can I dynamically change content of a div when I click on a button, using PHP. Step #4 - Use javascript functions to change text size and store the choice in a cookie When a user clicks on one of the text resizing choices, the javascript function changemysize() gets called. tested with: Win: ie6, ie7, ie8, Chrome 2, Firefox 2Mac: Safari 3, Safari 4 (beta), Firefox 3, Opera 9Unresolved Problem:IE6 and IE7 - something with scrollbar if the content is. Previous - Get the Max and Min Value from XML Attribute using jQuery Ajax Next - How to Assign the Width and Height of an Image using jQuery. We demonstrate this with the following example. However, when you make the browser window smaller, the parent div becomes as wide as the window and the children start wrapping around, making the parent taller (Even though we set a fixed height!). How to set the width of a DIV element dynamically using jQuery; How to animate DIV height on mouse hover using jQuery; How to animate a DIV height based on the content using jQuery; How to increase and decrease image size using JavaScript. I gave the div a width and height and using the var() function set its background color to the value of the -background custom property. font-size: 20px. An element centered horizontally and vertically without JavaScript!Pure CSS technique allows an element with dynamic height, horizontal and vertical justify center. I have a Div that has a height set in my CSS at 600px. You might want to use it as part of a web application -- it contains all you need for a lightweight "windowing" system. The overflow-y: hidden; allows the margin of the slide to hide all the sliders that cannot fit into the current width of the box. Change the cellPadding and cellSpacing of a table: 4. I faced a lot of problems when I asked to set the width of a gridview dynamically, that is the property AutoGenerateColumns set to AutoGenerateColumns="true" and the gridview was directly bounded from a dataset in code behind. The height and width properties are used to set the height and width of an element. outerText Identical to the above, except when assigning a new value to it, this value replaces the element itself. None of this is necessary, but I. (Although there is some variation of behaviour between browsers. Hello everyone, I need to change div's width and height only using Javascript. Re: change table width dynamically using javaScript (visual Studio, C#) Dec 01, 2007 10:23 PM|jamest85|LINK. However, when you make the browser window smaller, the parent div becomes as wide as the window and the children start wrapping around, making the parent taller (Even though we set a fixed height!). So when the app runs, the user enters something in the text box and can style it which ever way they desire. *Tek-Tips's functionality depends on members receiving e-mail. Dynamically calculate a div width. How to change the background color of a web page dynamically using JavaScript Topic: JavaScript / jQuery Prev | Next Answer: Use the JavaScript style property. Use JavaScript to create a dynamic progress bar:. The height and width properties are used to set the height and width of an element. How to set the width of a DIV element dynamically using jQuery; How to animate DIV height on mouse hover using jQuery; How to animate a DIV height based on the content using jQuery; How to increase and decrease image size using JavaScript. Javascript to change div width dynamically. The original image is of 252*62. Instead of having. As the image below illustrates, this method does not include padding, border, or margin. I gave the div a width and height and using the var() function set its background color to the value of the -background custom property. I want to dynamically set the height and width of an image using javascript so that the image looks proportionally fine according to different screen resolutions. You want to change the document structure dynamically. Hi Prakash, kkprakashmsc. Not necessarily a good idea. Determining the height and width of a dynamically. In other words, strings are inserted in a safe way, like elem. How to set the width of a DIV element dynamically using jQuery; How to animate DIV height on mouse hover using jQuery; How to animate a DIV height based on the content using jQuery; How to increase and decrease image size using JavaScript. How to change the background color of a web page dynamically using JavaScript Topic: JavaScript / jQuery Prev | Next Answer: Use the JavaScript style property. forms to find the input and test whether document. Dynamically changing HTML within a DIV?. The width() method simply returns the element's width as unit-less pixel value. Hi! How can I set a PopUp to automatically resize based on the screen size. But not much has been said about programming against the SharePoint 2010 client-side object model in JavaScript that you insert in a Content Editor Web Part. change table width dynamically using javaScript (visual Studio, C#) [Answered] RSS 10 replies Last post Oct 23, 2008 04:04 PM by qizhigang. dynamically change an element's type from textbox to textarea?? Dynamically rendering the content of script; Placing the form tag within dynamically generated text Change File Content; How to dynamically change text in a table's TD cell? sort items like Netflix - dynamically change text boxes or select fields; Way(s) to change text?. Tabular data in Javascript with hyper link: 2. You will learn how to create, access and control, and remove HTML elements dynamically. As the image below illustrates, this method does not include padding, border, or margin. Join a community of over 2. How to Dynamically Change Content on a Webpage? Updated on Feb 1, 2018 Posted by Editorial Staff Web Designing , Website Building 1 Comment Generally the entire content on a HTML page has a predefined styles using external stylesheet. I ran this code on SharePoint online and it worked fine. @fat This still being an issue, I think the right solution to this is to make Modal work with the grid system, and apply the negative margins based on that. Back then, they were talking about when companies merged to become more productive and profitable. - Nick Sadovnikov Nov 24 '11 at 9:19 you can look into getting the width of the reference box, calculating 70% of that and setting the result - in pixels - as the width of this div - iGbanam Nov 24 '11 at 10:18. Happy Hanukkah Alice! You need to go over all of the elements you got from getElementsByClassName (that function returns a list of elements, so you can't really use. HTML - Tables. I am trying to change my "inner" div's width dynamically on the click that the images are changed (which works) with a similar script. When this method is used to set width, it sets the width of ALL matched elements. Setting the height of a DIV dynamically. This article describes how to change the size of textbox at run time using jQuery. Which is dandy. If you want to assign Autosize to a hidden textarea element that you plan to reveal later, be sure to either specify the pixel width of the element in your CSS, or use the autosize. innerHTML on that), and for each of them you need to change the height of the element. Initially when the page loads, the font size is set to 16px. The example below shows setting the grid size and then changing it as the user selects the buttons. 6m developers to have your questions answered on Dynamically change the width of a tooltip based on it's content & restyle of UI for ASP. I want to dynamically set the height and width of an image using javascript so that the image looks proportionally fine according to different screen resolutions. This article describes a method to build web pages that provide that functionality using HTML and JavaScript. Hide and Show a Div Using Javascript This tutorial will show you how to create a hidden Div and display it with the click of a link. As user selects an option, form action gets dynamically set to respective page. The quickest way to achieve a responsive grid is to set the grid's containing div to a percentage. If a user wants to know the space required by actual displayed content including the space taken by padding but not including the scrollbars, margins or borders, then the user can use any of the following procedures that will return the width of the entire content of. This entry gives the details and explains why you should care. JavaScript / Ajax / DHTML Forums on Bytes. A change in box-sizing for CSS purposes may break such JavaScript. Change the name of the column. The width of an element does not include padding, borders, or margins! Note: The min-width and max-width properties override the width property. Normally, a cell takes up the space it needs to display the content. Can you change width and height of TinyMCE. JavaScript. getElementById method from JavaScript as shown below:. Note: For backwards compatibility with previous versions of the Custom Elements specification, some browsers will allow you to pass a string here instead of an object, where the string's value is the custom element's tag name. Styles and classes Before we get into JavaScript's ways of dealing with styles and classes - here's an important rule. I didn't know the height of the content and the textarea element doesn't resize naturally like other HTML elements, so I needed to update the height of the element with JavaScript each time the content changed. I want to set its width dynamically in JavaScript. I feel like this is what you are going for. I want to dynamically set the height and width of an image using javascript so that the image looks proportionally fine according to different screen resolutions. Suppose we have the following HTML:. NET MVC ToolTip. Change Div Size, Color, and Location with the W3C DOM. I need the top-level container (#bigbox) to always fit whatever width the table might be, with a minimum #bigbox width of 900px. forms to find the input and test whether document. I'm not certain about javascript however this can be done very easily in jQuery: You can change the base width of the divs by altering the. This blog aims to plug. Notice how I need to retrieve the first DIV's width by accessing it by ID, then its width property, and since this property contains a percentage value, I need to include a "%" prefix at the end of the expression to complete the setting. how to display multiple divs dynamically using javaScript? programming and asked to show multiple divs dynamically using javaScript div. Initially when the page loads, the font size is set to 16px. So if the contents in the content div is increased, like text size, the the other div stretch to. The content width of a div can dynamically get using clientWidth and scrollWidth properties depending upon the user requirement. If a user wants to know the space required by actual displayed content including the space taken by padding but not including the scrollbars, margins or borders, then the user can use any of the following procedures that will return the width of the entire content of. This article describes how to change the size of textbox at run time using jQuery. trigger( "resize" ) in the third. hi, i need to change the popup size to the GridView size (or say popup content size). Dynamically create a new element The first case is easy but you have to create all of the element at once and hide them which is not required currently. I need an auto-height for the object. So u suggest to get height of div with content on change and then set height property on window? March 13, 2013 at 5:43 pm Change window size dynamically with option resizable false #16997 Peter Stoev. I faced a lot of problems when I asked to set the width of a gridview dynamically, that is the property AutoGenerateColumns set to AutoGenerateColumns="true" and the gridview was directly bounded from a dataset in code behind. Step #4 - Use javascript functions to change text size and store the choice in a cookie When a user clicks on one of the text resizing choices, the javascript function changemysize() gets called. The width attribute is used to set a predefined width of a cell. "frame1" is the name of the div that I want to resize. I'm not certain about javascript however this can be done very easily in jQuery: You can change the base width of the divs by altering the. Activities. @fat This still being an issue, I think the right solution to this is to make Modal work with the grid system, and apply the negative margins based on that. How can I change the pageSize property of the Grid when the height changes so that as many rows as possible are always displayed. That is, I want it to always only take up 90% of the screen of the user regardless on if he is using a 1920x1080 or a 1280 x 720 screen. So if the contents in the content div is increased, like text size, the the other div stretch to. How to dynamically add content to a div and store the content to a cookie via JavaScript This is an example of adding dynamic content via JavaScript by allowing the user type in the actual content. Which is dandy. Change font color by style of id of tag with color attribute in javascript. innerHTML The complete content (including HTML tags, if any) of an element. Specify frames of a table: 5. By joining you are opting in to receive e-mail. I would like to be able to change the style within a CSS class using JavaScript. width=500; but this line of code isn't Stack Overflow. action() method. Perhaps you want to provide theme support for your site. No mark-up changes needed. You will learn how to create, access and control, and remove HTML elements dynamically. Using JavaScript the style of any element can be changed via the properties of that element's style object. By joining you are opting in to receive e-mail. So when the app runs, the user enters something in the text box and can style it which ever way they desire. We are migrating a line-of-business app from UWP to HTML5. It is intended for use with Responsive Designs and to be combined with Fluid Image techniques. I am using this following code: getElementById('div_register'). create div element dynamically by using javascript In this tutorial you will learn how to create div element dynamically by using javascript. Let's say you want to show the div on button click, which would hidden initially (there are different ways to make it hide ;). You can actually make the DIV tag act as a server side control and change it's styles dynamically! Here's How:. Im a total amateur trying to figure out how to resize a div to a set percentage of the users browser - regardless of how they resize it. I have taken the original function posted and edited it a little bit for the demo. There's an iframe and another div inside of it and when I went to fine tune the alignment I discovered I could change the width of the div but not the height I can set it to 200 or 1000, it doesn't make the slightest difference. Join a community of over 2. Dynamic forms are instant crafted form. I assume this can be done using jquery/JS but can not figure out how. I need an auto-height for the object. trigger( "resize" ) in the third. How would I go about this using JQuery?. JavaScript. The original image is of 252*62. By now, you are probably wondering why there is this weird behavior when you set a canvas 's size via CSS and when you set it directly on the element. I know that iframes have been beaten to death on this site as well as others. I'm having an issue getting the height and width of DIV elements that have resized themselves to fit their content. Here Mudassar Ahmed Khan has explained how to dynamically adjust the width of the ASP. We can use JavaScript to directly set a style on an element, and we can also use JavaScript to add or remove class values on elements which will alter which style rules get applied. Great for portfolio websites that work nicely both on desktop and mobile devices. Initially when the page loads, the font size is set to 16px. The width of an element does not include padding, borders, or margins! Note: The min-width and max-width properties override the width property. The content width of a div can dynamically get using clientWidth and scrollWidth properties depending upon the user requirement. Also Read: How to Extract Data from an XML File Using JavaScript. 67vh high (if you were to mimick your example), and who's background image covers the whole div. width=500; but this line of code isn't Stack Overflow. As of jQuery 1. Tutorial Introduction; Defining Dynamic Properties inside your HTML. Scrollable Table with Fixed Header and javascript (2) If the predefined width of the TD is less than the content. Dynamic Grid. Is it possible, with the following fiddle, to dynamically control the width and height of all paragraph. I recommend to specify the width in pixels, because not all browsers are able to handle the percentages in the JS. Will changing the CSSStyleDeclaration object of an element always change the element's style? Why? List two ways to access a specific style sheet. change table width dynamically using javaScript (visual Studio, C#) [Answered] RSS 10 replies Last post Oct 23, 2008 04:04 PM by qizhigang. Typically this is done by assigning width:100% in your CSS, but this presents a problem for Javascript since it can be very hard to get that relative size rather than the absolute pixels. font-size: 20px. Dynamic forms are instant crafted form. like, if i remove or hide right div, left div width should 100% dynamically with javascrpt. update method after you reveal the. NET Forums / General ASP. I didn't know the height of the content and the textarea element doesn't resize naturally like other HTML elements, so I needed to update the height of the element with JavaScript each time the content changed. The 'info' div contains three paragraph elements and the musical note image, all of which will be displayed within the container. Specify frames of a table: 5. But the height is not giving me the same behaviour, the height of the div expands to fit whatever content. Here Mudassar Ahmed Khan has explained how to allow website visitors to change i. I see the max-width of the column is set to 500px. Ignoring inline styles, the other approach that we can use to introduce elements to the goodness that is CSS styling involves JavaScript. JavaScript / Ajax / DHTML Forums on Bytes. The width of an element does not include padding, borders, or margins! Note: The min-width and max-width properties override the width property. You will learn how to create, access and control, and remove HTML elements dynamically. thanks, seb. Add the following two lines below your first ones: div. I then set the input to display as a block level element, gave it a width, and also used auto margins to center it. I gave the div a width and height and using the var() function set its background color to the value of the –background custom property. How to dynamically remove/delete elements via JavaScript This post is in response to one of the comments on have received regarding the removal of elements via JavaScript. The sometext class is detailed in a seperate CSS file called stylesheet. @fat This still being an issue, I think the right solution to this is to make Modal work with the grid system, and apply the negative margins based on that. dynamically change the width of table cell(td) thorough java script i am unable to change the width of newly created table. All CSS dynamic. Hide and Show a Div Using Javascript This tutorial will show you how to create a hidden Div and display it with the click of a link. innerHTML on that), and for each of them you need to change the height of the element. I didn't know the height of the content and the textarea element doesn't resize naturally like other HTML elements, so I needed to update the height of the element with JavaScript each time the content changed. Change Div Size, Color, and Location with the W3C DOM. The first goal is to show you how to generate a dynamic HTML table, rows, and cells. Flexible table width Often you may want to have your table resize dynamically with the page. How to dynamically remove/delete elements via JavaScript This post is in response to one of the comments on have received regarding the removal of elements via JavaScript. (The musical note image is. Change the pageSize by using the pageSize method of the dataSource. So if the contents in the content div is increased, like text size, the the other div stretch to. width = WIDTH + 'px'; div. The Palestinian National Unity Government, Mahmoud Abbas, Fatah, Khaled Mashal, Hamas, Mecca accords, Israel, America. The example below shows setting the grid size and then changing it as the user selects the buttons. The gist of it is that you place your textarea inside a wrapper div, set the textarea height to 100% so that it fills the parent, and then insert a div behind the textarea that maintains a copy of the textarea text. It's very easy. We demonstrate this with the following example. innerHTML on that), and for each of them you need to change the height of the element. Simple Way To Set The Height/Width Dynamically Using CSS While working on the HTML designs, I came across some of the design issues that I would like to share them along with the solutions. The content width of a div can dynamically get using clientWidth and scrollWidth properties depending upon the user requirement. outerText Identical to the above, except when assigning a new value to it, this value replaces the element itself. Requirement #1: A scrollable view with fixed header and footer with 50px of height ( should work for multiple resolutions ). Dynamically calculate a div width. Thanks For A2A Html: [code]. The width of an element does not include padding, borders, or margins! Note: The min-width and max-width properties override the width property. < title > Create DIV Dynamically Using JavaScript (HtmlTextWriterStyle. There's an iframe and another div inside of it and when I went to fine tune the alignment I discovered I could change the width of the div but not the height I can set it to 200 or 1000, it doesn't make the slightest difference. This sample page contains the javascript that show how to center a div in the screen or in the visible area of the browser (without toolbars). How can I change the height and width of an element with Javascript? I have tried and so far I can only change. fixing column width in a dynamic table. Dynamic Grid. So my guess is that I would need to set the width property dynamically via Javascript. Well, if you want to dynamically show/hide the div, you can use jQuery show()/hide() methods. Hi, Can I make an s:select list to have a static width to have the following properties 1. Setting the width of a block-level element will prevent it from stretching out to the edges of its container. The width is set to some flexible dimension—either a percentage, as I've done here, or an em value to make it elastic—so that the div can change in width to show more or less of the image. 67vh high (if you were to mimick your example), and who's background image covers the whole div. - Nick Sadovnikov Nov 24 '11 at 9:19 you can look into getting the width of the reference box, calculating 70% of that and setting the result - in pixels - as the width of this div - iGbanam Nov 24 '11 at 10:18. so there is what i want to change width for left div. Ignoring inline styles, the other approach that we can use to introduce elements to the goodness that is CSS styling involves JavaScript. height = HEIGHT + 'px'; Save and try refreshing your browser — you should now see the div become as big as your viewport, whatever size of screen your are using. Demo Change Font Color JavaScript Red color yellow color green color blue color. Depending on your scenario, you may wish for the. Width, I am trying to use them in my application but I am not able to change the. *Tek-Tips's functionality depends on members receiving e-mail. font-size: 20px. It may be useful sometimes to provide your visitors with the option to change the appearance of your website. The sometext class is detailed in a seperate CSS file called stylesheet. So if the contents in the content div is increased, like text size, the the other div stretch to.