window.onload = function ()
{
	var box_main = parseInt(document.getElementById("box-main").offsetHeight);
	var box1 = parseInt(document.getElementById("box1").offsetHeight);
	var box2 = parseInt(document.getElementById("box2").offsetHeight);
	
	if((box1) && (box2))
	{
		document.getElementById("box2").style.height = box_main - box1 - 22 + "px";
	}
}