window.onload = function(e){
	if ( lb = document.getElementById("leftbox") )
	{
		lbH = lb.offsetHeight;
		if ( cb = document.getElementById("centerbox") )
		{
			cbH = parseInt(cb.offsetHeight);
			if ( lbH < cbH )
			{
				lb.style.height = cbH;
			}
		}
	}
}