function findPageHeight(){
var winWidth, winHeight, d=document;
if (typeof window.innerWidth!='undefined') {
winWidth = window.innerWidth;
winHeight = window.innerHeight;
} else if ( d.documentElement
&& typeof d.documentElement.clientWidth!='undefined'
&& d.documentElement.clientWidth!=0 ) {
winWidth = d.documentElement.clientWidth;
winHeight = d.documentElement.clientHeight;
} else if ( d.body
&& typeof d.body.clientWidth!='undefined') {
winWidth = d.body.clientWidth;
winHeight = d.body.clientHeight;
}

var frame = document.getElementById("footer_content");
var htmlheight = d.getElementById("pagewidth").clientHeight;
if (htmlheight < winHeight){
	d.body.style.height = winHeight - htmlheight + "px";
	frame.style.height = winHeight - htmlheight + "px";}
}