function menuOn(){
	for(var i=0; i<document.getElementById('topmenu').getElementsByTagName('li').length;i++){
		document.getElementById('topmenu').getElementsByTagName('li')[i].onmouseover = function(){
				
			if(this.getElementsByTagName('div')[0]){				
				this.getElementsByTagName('div')[0].style.display = '';				
			}
		}
		document.getElementById('topmenu').getElementsByTagName('li')[i].onmouseout = function(){			
			if(this.getElementsByTagName('div')[0]){
				this.getElementsByTagName('div')[0].style.display = 'none';		
			}
		}
	}
}

window.onload = function(){	
	menuOn()
}