var w=window;
var d=document; 
function setHeight(){
	var lL,lC,lR;
	lL=d.getElementById("layL").offsetHeight;
	lC=d.getElementById("layC").offsetHeight;
	lR=d.getElementById("layR").offsetHeight;
	var b=(lL>=lC)?lL:lC;
	b=(b>=lR)?b:lR;
	d.getElementById("layL").style.height=d.getElementById("layC").style.height=d.getElementById("layR").style.height=b+"px";
}