function init() {
	if(boton!=''){
		document.getElementById(boton).className="menu_item";
	};
	var todos=document.getElementsByTagName('div');
	for (a=0;a<todos.length;a++){
		if (todos[a].className.indexOf('menu_item_off')!=-1){
			todos[a].onmouseover=MouseOver;
			todos[a].onmouseout=MouseOut;
			todos[a].onclick=ir;
		}
	}
}

function MouseOver() {
	this.className='menu_item_on';
}

function MouseOut() {
	this.className='menu_item_off';
}
function ir(){
	document.location=this.childNodes[0];
}


window.onload=init;