function setMinheight(){
	if(!document.getElementById) return false;
	if(!document.getElementById("main")) return false;
	var el=	document.getElementById("main");
	var hgt=(document.documentElement.clientHeight-0);
	var scrlhgt=(document.documentElement.scrollHeight+40);
	if(scrlhgt<=hgt) scrlhgt=hgt=hgt-38;// -38
	el.style.height=Math.max(scrlhgt, hgt)+"px";
	//	var cont=document.getElementById("container");
	//	alert(hgt+ " " + scrlhgt);
}