Relax with Javascript: Randomize Your CSS Style

written by aext on November 6, 2009 in CSS & HTML and Javascript with 13 comments

This is just a small tip for fun. Sometime, we are bored with the only-one style in our website, but today, we will make some changes. We will create a javascript to randomize the CSS every time we refresh the web page. For what? Just make our style always get new.

Try to refresh the demo page to see the effect.

We will use javascript function Math.random() to generate a random number between 0 and number of elements of an array which is an arrangement of stylesheet items.

Create a new javascript file which contains this function:

function rand(){
    return Math.round(Math.random()*(css.length-1));

This gets us numbers from 0 to < (css.length-1) (Because the elements start from 0) which is this array below:

var css = new Array(
    '<link rel="stylesheet" type="text/css" href="default.css">',
    '<link rel="stylesheet" type="text/css" href="style2.css">',
    '<link rel="stylesheet" type="text/css" href="style3.css">',
    '<link rel="stylesheet" type="text/css" href="style4.css">'

Then write it in HTML

rand = rand();


That’s it! Enjoy the random CSS by refresh your webpage. Your random effect will show clearly if you have many elements in array. The more elements, the less repeat.