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This tutorial contains a JavaScript function that can be used to set the same Height for multiple HTML elements in page.
It is useful when you have multiple DIVs (or other HTML tags) with dynamic content (different height), and you want to make them all the same height.
Add the following JavaScript script at the bottom of your HTML document, before the </body>, or after all the tags you want to align.
Then, in this instruction: alignHgs('id1', 'id2', 'id3');, replace the arguments: 'id1', 'id2', 'id3' with the ID of the HTML tags you want to align.
You can add as many IDs as you want, each one between quotes, separated by comma.
<script>
// - coursesweb.net
// get the height of the HTML TAGs which ID passed in parameters
// sets the max-height to each tag
function alignHgs() {
// get the arguments and their number
var args = alignHgs.arguments;
// traverse the array with arguments, get the height of each TAG and add it in the 'ar_hgs' array
var ar_hgs =[];
for (var i=0; i<args.length; i++) {
ar_hgs[i] = document.getElementById(args[i]).clientHeight;
}
// get the largest number (max height) in the 'ar_hgs' array
var max_hg = Math.max.apply(null, ar_hgs);
// set max height to all tags in arguments
for (var i=0; i<args.length; i++) {
document.getElementById(args[i]).style.height = max_hg+'px';
}
}
// calls the function with the IDs of the tags
alignHgs('id1', 'id2', 'id3');
</script>
This script gets the maxim height of the elements with the ID passed as arguments, then it sets that value to each of those tags, when the page is loaded.
If you want to align the heights when a link, or a button is clicked, just delete the alignHgs('id1', 'id2', 'id3'); from the script and add this instruction in that link (or button), with onclick='alignHgs('id1', 'id2', 'id3');'. Se also the example below.
<!doctype html>
<html>
<head>
<title>title</title>
<style>
div {
float:left;
width:30%;
margin:2px;
border:2px solid blue;
background-color:#e7fee8;
}
</style>
</head>
<body>
<h4>example JavaScript Height align</h4>
<p>The browser will display the following result (<span class='si'>click the 'Align' button</span>):</p>
<div id='dv1'>marplo.net - Free courses</div>
<div id='dv2'>
coursesweb.net - Free Web development courses:<br />
- video tutorials<br />
- free lessons and download resources
</div>
<div id='dv3'>
www.php.net - PHP team website<br />
- server-side scripting language.
</div>
<br style='clear:both;' />
<button onclick="alignHgs('dv1', 'dv2', 'dv3')">Align</button>
<script>
//from: coursesweb.net/
// get the hight of the HTML TAGs which ID are sent as parameters
// sets the max-height to each tag
function alignHgs() {
// get the arguments and their number
var args = alignHgs.arguments;
// traverse the array with arguments, get the hight of each TAG and add it in the 'ar_hgs' array
var ar_hgs =[];
for (var i=0; i<args.length; i++) {
ar_hgs[i] = document.getElementById(args[i]).clientHeight;
}
// get the largest number (max height) in the 'ar_hgs' array
var max_hg = Math.max.apply(null, ar_hgs);
// set max height to all tags in arguments
for (var i=0; i<args.length; i++) {
document.getElementById(args[i]).style.height = max_hg+'px';
}
}
</script>
</body>
</html>
<div>Web Programming and Development</div>
h2 {
text-decoration: underline;
}function someFunction() { alert("CoursesWeb.net"); }
setTimeout("someFunction()", 2000);$food =["fruits" =>["banana", "apple"), "veggie" =>["collard", "pea")); $nr_food = count($food, 1); echo $nr_food; // 6