var browser = navigator.appName.substring(0,8);
	var version = parseInt(navigator.appVersion); 
	var javasupport = ((browser == "Netscape") && (version >= 3)) ||
    					              ((browser == "Microsof") && (version >= 4));
							  
	if (javasupport) 
	{
   		var normal = new makeArray(6);
	    var hilite = new makeArray(6);
   
	   hilite[1].src = "gfx/menu_1s.png"
	   hilite[2].src = "gfx/menu_2s.png"
	   hilite[3].src = "gfx/menu_3s.png"
	   hilite[4].src = "gfx/menu_4s.png"
	   hilite[5].src = "gfx/menu_5s.png"
	   hilite[6].src = "gfx/menu_6s.png"

	   normal[1].src = "gfx/menu_1.png"
	   normal[2].src = "gfx/menu_2.png"
	   normal[3].src = "gfx/menu_3.png"
	   normal[4].src = "gfx/menu_4.png"
	   normal[5].src = "gfx/menu_5.png"
	   normal[6].src = "gfx/menu_6.png"
	}
                
function makeArray(n) 
{
   this.length = n
   for (var i = 1; i<=n; i++) 
   {
       this[i] = new Image()
   }
   return this
}

function onImage(num) 
{
	if (javasupport) 
	{
    	  document.images[num].src = hilite[num].src;
	}
}

function offImage(num) 
{
	if (javasupport) 
	{
		document.images[num].src = normal[num].src;
	}
}