var n = 7;
var f = false;
var b = new Array;

function preload()
{

   	if(document.images)
	{

	  for(i=2;i<=n;i++)
               {
			   str = '/image/menu_up' + i + '_l.gif';
               b[i-1] = new Image();
               b[i-1].src = str;
	}
            	f = true;
 	}
}

function on(im)
{

	if (f == true) 
		{
		 document.getElementById(im).src = "/image/"+im+"_l.gif";
	    }
		
}

function off(im)
{
	if (f == true)
		document.getElementById(im).src = "/image/"+im+".gif";
}

function show_bar(ev, id) {
	MouseX = ev.clientX + document.body.scrollLeft;
	MouseY = ev.clientY + document.body.scrollTop;

	obj = document.getElementById("win[" + id + "]");

	obj.style.top = MouseY + 10 + "px";
	obj.style.left = MouseX + "px";
	obj.style.visibility = "visible";
	}

function hide_bar(id) {
	document.getElementById("win[" + id + "]").style.visibility="hidden";
	}