IE Freezes When I Set The Height Of A Div

I was using a piece of javascript function that I found online(unfortunately, I lost the source of this function), which basically provides the screen size. I added a few more lines to use that function so that when the user change the window size, the content div resizes as well.(didn't want the user to scroll down or sideways). Everything works except when I resize the height, IE freezes. Here's the function I am using:

Code:

function resize()
{
var contentHolder = document.getElementById('content') ;

var availW ;
var availH ;

if(document.all)
{
availW = document.body.clientWidth;
availH = document.body.clientHeight;
}
else
{
availW = innerWidth;
availH = innerHeight;
}

contentHolder.style.width = availW - 35 + "px" ;
//contentHolder.style.height = availH - 250 + "px" ;

}

The last commented line works fine in firefox and opera, which is supposed to resize the div so that all the contents are within the browser window and the user doesn't have any scrollbar. But as I mentioned, it's not working in IE. IE resizes the width properly. Any idea why IE is having trouble resizing the height? Please let me know if you think there's a better way of doing this.