function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}

//Display a named menu, at the position of another object
function display_menu(parent,named,e)
{
	//get the named menu
	var menu_element = document.getElementById(named);
	//Get mouse positions
	if (!e) var e = window.event;
	var mouse_x = Event.pointerX(e);
	var mouse_y = Event.pointerY(e);

	//override the 'display:none;' style attribute
	menu_element.style.display = "";
	//get the placement of the element that invoked the menu...
	var placement = findPos(parent);
	//...and put the menu there
	var shopByCategory = document.getElementById("shop_by_category");
	//alert(shopByCategory.offsetHeight);
	menu_element.style.left = mouse_x + 10  + "px";
       menu_element.style.top = mouse_y +10  + "px";

// 	alert(mouse_x);
}

//Hide a named menu
function hide_menu(named)
{
	//get the named menu
	var menu_element = document.getElementById(named);
	//hide it with a style attribute
	menu_element.style.display = "none";
}
function mouseX(evt) {
if (evt.pageX) return evt.pageX;
else if (evt.clientX)
   return evt.clientX + (document.documentElement.scrollLeft ?
   document.documentElement.scrollLeft :
   document.body.scrollLeft);
else return null;
}
function mouseY(evt) {
if (evt.pageY) return evt.pageY;
else if (evt.clientY)
   return evt.clientY + (document.documentElement.scrollTop ?
   document.documentElement.scrollTop :
   document.body.scrollTop);
else return null;
}