function rsize(){
	var s=0;var l=document.getElementById("left");var r=document.getElementById("right");var c=document.getElementById("content");
	if(l.offsetHeight>s)s=l.offsetHeight;if(r.offsetHeight>s)s=r.offsetHeight;if(c.offsetHeight>s)s=c.offsetHeight;
	l.style.height=s+"px";r.style.height=s+"px";c.style.height=s+"px";
}