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

function MouseOver() {
	this.className='btn_menu2On';
}

function MouseOut() {
	this.className='btn_menuOff';
}
window.onload=init;