var image_path = "/images/";
	var ok = false;	
	if (document.images) {
		var names = new Array();
		var msg = new Array();
		names[0] = "uppernav/one_pixel1_";
		names[1] = "uppernav/home_";
		names[2] = "uppernav/one_pixel2_";
		names[3] = "uppernav/trouble_";
		names[4] = "uppernav/one_pixel3_";
		names[5] = "uppernav/document_";
		names[6] = "uppernav/one_pixel4_";
		names[7] = "uppernav/updates_";
		names[8] = "uppernav/one_pixel5_";
		names[9] = "uppernav/releases_";
		names[10] = "uppernav/one_pixel6_";
		var on = new Array();
		var off = new Array();
		for (var i=0; i<names.length; i++) {
			off[i] = new Image();
			off[i].src = image_path + names[i] + "off" + ".gif";

			on[i] = new Image();
			on[i].src = image_path + names[i] + "on" + ".gif";
		}
		ok = true;
	}	
	function switch_on(num) {
		document.images[names[num]].src = on[num].src;
	}	
	function switch_off(num) {
		document.images[names[num]].src = off[num].src;
	}
	function switch_on_group(num)	{
		if(num > 0)	{
			document.images[names[num]].src = on[num].src;
			document.images[names[num-1]].src = on[num-1].src;
			document.images[names[num+1]].src = on[num+1].src;
		}
	}
	function switch_off_group(num)	{
		if(section != num)	{ 
			document.images[names[num]].src = off[num].src;
			if(section + 1 != num - 1)	{ 
				document.images[names[num-1]].src = off[num-1].src;
			}
			if(section - 1 != num + 1)	{ 
				document.images[names[num+1]].src = off[num+1].src;
			}
		}
	}