//this part preloads the images
	
	if (document.images){
	
		//preloads latest info rollover
		
		var nav_info_on = new Image;
		nav_info_on.src = "../img/nav_info_on.gif";
		var nav_info_off = new Image;
		nav_info_off.src = "../img/nav_info_off.gif";
		
		//preloads special products rollover
		
		var nav_special_on = new Image;
		nav_special_on.src = "../img/nav_special_on.gif";
		var nav_special_off = new Image;
		nav_special_off.src = "../img/nav_special_off.gif";
		
		//preloads timtables rollover
		
		var nav_timetable_on = new Image;
		nav_timetable_on.src = "../img/nav_timetable_on.gif";
		var nav_timetable_off = new Image;
		nav_timetable_off.src = "../img/nav_timetable_off.gif";	
	}
		
//these are the functions for swapping the image source
	
	function imgOn(imgName){
		if(document.images){
			document[imgName].src = eval(imgName + "_on.src");
		}
	} 
	
	function imgOff(imgName){
		if(document.images){
			document[imgName].src = eval(imgName + "_off.src");
		}
	}
	
	
	
	function compOpen(url){
	if(screen.height<768){
		window.open(url,"competition","width=500,height=500,scrollbars=yes")
	} else {
		window.open(url,"competition","width=500,height=620,scrollbars=yes")
	}
	}
	
	function restriction(url){
	window.open(url,"restriction","width=300,height=300,scrollbars=yes,resizable=yes")
	}