function f1()
{
		height_work_screen = document.body.clientHeight;
		height_wrap1 = document.getElementById("wrap1").clientHeight;
		if (height_work_screen > height_wrap1)
		{
			document.getElementById("wrap1").style.height = height_work_screen+'px';
			document.getElementById("wrap2").style.height = height_work_screen+'px';
		};

}
if (window.addEventListener)
window.addEventListener("load", f1, false)
else if (window.attachEvent)
window.attachEvent("onload", f1)