function checkHeight(){
	var main = document.getElementById("mainContainer");
	var menu = document.getElementById("menusx");
	
	var hMain = main.offsetHeight;
	var hMenu = menu.offsetHeight;
//	alert(hMain);
//	alert(hMenu);
//	alert(hMain-hMenu);

	if (hMain-hMenu<=430){
		menu.style.height=(hMain-hMenu)+150+"px";
	}

	//for (i=0; i<20; i++) alert(hMain-hMenu);
}