Question

k this is probably something very easy but for some reason i am getting an error when trying to use javascript to change style.height.

My javascript looks like this:

document.getElementById('div').style.height=100px; 

I have also tried

document.getElementById('div').style.height='100px'; 
document.getElementById('div').style.height='100';
document.getElementById('div').style.height=100; 

and get the same error every time.

The error i am getting is:

document.getElementById('div') is null

I get this error in my firebug console. Thanks.

Answer 1

You probably don’t have an element with id="div".

Or you’re running your code before the body exists.