function dropDownMenu() {
	var divs = document.getElementsByTagName('div');
	for(i = 0; i < divs.length; i++){
		if(divs[i].className == 'corner-right-top'){
			lis = divs[i].getElementsByTagName('li');
			for(k = 0; k < lis.length; k++){
				lis[k].onmouseover = function(){
					var subUl = this.getElementsByTagName('ul')[0];
					var h = this.offsetHeight;
					if(subUl){
						subUl.style.display = 'block';
						subUl.style.backgroundPosition = '0px ' + h + 'px';
						this.className += ' active';
					}
				}
				lis[k].onmouseout = function(){
					var subUl = this.getElementsByTagName('ul')[0];
					if(subUl){
					    this.className = this.className.replace('active', '');
						subUl.style.display = 'none';
					}
				}
			}
		}
	}
}