function MenuOn(x,y){ 
	obj=document.getElementById("submenu_"+x+"_"+y).style.display="block";
	//document.getElementById("submenu"+x+y).style.display="block";
}

function MenuOff(x,y){ 
	obj=document.getElementById("submenu_"+x+"_"+y).style.display="none";
	//document.getElementById("submenu"+x+y).style.display="none"; 

}