Resize control using JavaScript

[Theo]

Hi all,

 

I want to resize a listbox using JavaScript. I want to check the current resolution of a user and then take appropriate measures.

 

This is what I have so far:

 

function CheckResolution() {
   if (screen.availWidth == '1024')
   {
       document.forms[0].lbTest.Height = 200px;
   }
   else
   {
       document.forms[0].lbTest.Height = 400px;
   }
}

 

But nothing happends. Can someone help me with this?

 

Thanks,

 

Theo