Setting top and left CSS attributes

Question

For some reason I'm unable to set the "top" and "left" CSS attributes using the following JavaScript.

var div = document.createElement('div');
div.style.position = 'absolute';
div.style.top = 200;
div.style.left = 200;
document.body.appendChild(div);

Using Firebug I can see that the div gets the position set to "absolute" but the top and left attributes are not set!

This is for Firefox 3.6.

user_166589 · Answer

Your problem is that the top and left properties require a unit of measure, not just a bare number:

div.style.top = "200px";
div.style.left = "200px";

user_10854173 · Answer

We can create a new CSS class for div.

 .div {
      position: absolute;
      left: 150px;
      width: 200px;
      height: 120px;
    }