[SOLVED] append child a div element not working?

[sayedsohail]

Hi i am trying to append a div inside the document, but its not working in IE and firefox. Here is my simple code.

 

function buildDimmerDiv()
{
z=document.body.appendChild(document.createElement("div"));
    z.id = "dimmer";
    z.style.width = window.screen.width+'px';
   z.style.height = window.screen.height+'px';
    
   
}