>>>> > sh=screen.availHeight;
>>>> > sw=screen.availWidth;
>>>> > ch=document.body.clientHeight;
>>>> > cw=document.body.clientWidth;
>>>> > if(!cw){ch=sh-132;cw=sw-8}
ch = document.defaultView.
getComputedStyle(document.body, "").getPropertyValue("height");
cw = document.defaultView.
getComputedStyle(document.body, "").getPropertyValue("width");
Note that IE and mozilla have a difference of opinion as to how high the
<body> element is for documents that are shorter than the viewport.
In IE the body is never shorter than the viewport, while in Mozilla it
always follows the content size.
