var imgCollection = new Object();
	
	nav_blank = new Image();
	nav_blank.src = BasePath + "images/blank.gif";
	
	function loadImage(img_name)
	{
		var navimg;

		navimg = imgCollection[img_name];

		if(navimg == null)
		{
			navimg = new Image();
			navimg.src = BasePath + "images/" + img_name + ".gif";
			imgCollection[img_name] = navimg;
		}

		return navimg;
	}
	
	function highlight(img_target, img_src)
	{
		var target = document.getElementById(img_target);
		if(img_src != 'blank')
		{
			var navimg = loadImage(img_src);
			target.src = navimg.src;
		} else {
			target.src = nav_blank.src;
		}
	}
		
	var winit = null;
	function photo_tour(tourUrl)
	{
	   // if (ShowPopupWarning())
		//{
			LeftPosition = (screen.width) ? (screen.width-600)/2 : 0;
			TopPosition = (screen.height) ? (screen.height-480)/2 : 0;
			settings =  'height=600,width=600,top='+TopPosition+',left='+LeftPosition+',scrollbars=no,resizable';
			winit = window.open(tourUrl,'PHOTOTOUR',settings);
			winit.focus();
		//}
	}

	function popUp(URL) {
	day = new Date();
	id = day.getTime();
	eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=600,height=400,left = 340,top = 212');");
	}