function menu_hover_on(obj){
	obj.parentNode.style.backgroundColor = "#cd3335";
	obj.firstChild.style.color = "#fff";
}

function menu_hover_off(obj){
	obj.parentNode.style.backgroundColor = "#ebebeb";
	obj.firstChild.style.color = "#000";
}

function layout(){
	if (window.innerHeight){
		document.getElementById("content").style.height = window.innerHeight - 140 + "px";
	}
	if(document.body.offsetHeight){
		document.getElementById("content").style.height = document.body.offsetHeight - 140 + "px";
	}
}