function f1_on(menu)
{
	f1_off();
	document.getElementById(menu).style.visibility = "visible";
}	 

function f1_off()
{
   	document.getElementById('menu_X').style.visibility = "hidden";	
}
			   
			   
function f_on(menu, Mmenu)
{
	f_off();
	document.getElementById( menu).style.left = getX(document.getElementById( Mmenu));
	document.getElementById( menu).style.top =  getY(document.getElementById( Mmenu))+15;
	//alert("xy:"+menu+"«"+Mmenu+getX(document.getElementById( Mmenu))+"<>"+getY(document.getElementById( Mmenu))+23);
	document.getElementById(menu).style.visibility = "visible";
}	 

function f_off()
{

	for(i=1;i<=4;i++)
		document.getElementById('ssmenu'+i).style.visibility = "hidden";	
}

function getX(elm)
{
	var x= elm.offsetLeft;
	while (elm.offsetParent)
	{
		elm = elm.offsetParent;
		x += elm.offsetLeft;
	}
			 
	return x;
}

function getY(elm)
{
	var y= elm.offsetTop;
	while (elm.offsetParent)
	{
		elm = elm.offsetParent;
		y += elm.offsetTop;
	}
	return y;
}