Question

Possible Duplicate:
Change an element's CSS class with JavaScript

Found lot of topics about this topic, but none helped me. I have:

<div id="text-6" class="block col-228">

Javascript code should add new class fit, so result should be:

<div id="text-6" class="block col-228 fit">

How to do that with javascript?

Answer 1

Try like this:

var elem = document.getElementById("text-6");
elem.setAttribute("class", elem.getAttribute("class")+" fit");

Important note: You need to be assure,that your DOM Hierarchy is constructed completely,then try to manipulate DOM Elements. That is why you need to put DOM manipulation scripts inside of the window.onload callback, or if you use jQuery, then inside of $(document).ready callback.