window.onload = function matchHeight(){
			var heightOne = document.getElementById('body').clientHeight;
			var heightTwo = document.getElementById('right').clientHeight;
			if(heightOne < heightTwo){
				document.getElementById('body').style.height = heightTwo + 'px';
			}else{
				document.getElementById('right').style.height = heightOne + 'px';
			}
		}

function showSubMenu(elem){
	if(elem.getElementsByTagName("ul").length > 0){
		var childUl= elem.getElementsByTagName("ul");
		if (childUl[0].className == 'child_menu') {
			childUl[0].style.display = "block";
		}
	}
}

function hideSubMenu(elem){
	if(elem.getElementsByTagName("ul").length > 0){
		var childUl= elem.getElementsByTagName("ul");
		if (childUl[0].className == 'child_menu') {
			childUl[0].style.display = "none";
		}
	}
}