if(document.images){
	 
	 top_nav1=new Image
	 top_nav2=new Image
	 top_nav3=new Image
	 top_nav4=new Image
	 top_nav5=new Image
	 top_nav6=new Image
	 top_nav7=new Image
	 top_nav8=new Image
	 
	 top_nav1.src="http://www.shop4fancydress.com/images/menu/hire_mo.gif"
	 top_nav2.src="http://www.shop4fancydress.com/images/menu/hire_off.gif"
	 top_nav3.src="http://www.shop4fancydress.com/images/menu/buy_mo.gif"
	 top_nav4.src="http://www.shop4fancydress.com/images/menu/buy_off.gif"
	 top_nav5.src="http://www.shop4fancydress.com/images/menu/ebay_mo.gif"
	 top_nav6.src="http://www.shop4fancydress.com/images/menu/ebay_off.gif"
	 top_nav7.src="http://www.shop4fancydress.com/images/go_to_ebay_mo.jpg"
	 top_nav8.src="http://www.shop4fancydress.com/images/go_to_ebay_off.jpg"
	 

	 }
	 else{
	 top_nav1=""
	 top_nav2=""
	 top_nav3=""
	 top_nav4=""
	 top_nav5=""
	 top_nav6=""
	 top_nav7=""
	 top_nav8=""
	 
	 	 
	 document.hire=""
	 document.buy=""
	 document.ebay=""
	 document.ebaygo=""
	 	 
	 }