function columns(){
	var leftDiv = document.getElementById('contentleft');
	var main = document.getElementById('contentcenter');
	var frame = document.getElementById('frame');
	var lHeight = leftDiv.clientHeight;
	var cHeight = main.clientHeight;
	var newHeight = 0;
	if(lHeight > cHeight){	//we need to resize the main frame
		newHeight = lHeight+131;
		frame.style.height=newHeight+"px;";
	}else{
		newHeight = cHeight;
		leftDiv.style.height=newHeight+"px";
	}
}