function fixH(one,two) {
	if (document.getElementById(one)) {
		var lh=document.getElementById(one).offsetHeight;
		var rh=document.getElementById(two).offsetHeight;
	//	var nh = Math.max(lh, rh);
		var nh = lh-rh+90;
		document.getElementById("space").style.height=nh+"px";
		
	}
}
		
window.onload=function(){
		fixH('maincontent','left');
}