if(document.images){
	 
	 sub_map1=new Image
	 sub_map2=new Image
	 sub_map3=new Image
	 sub_map4=new Image
	 sub_map5=new Image
	 sub_map6=new Image
	  
	 
	 sub_map1.src="http://www.hoffler.co.uk/images/menu/home-on.png"
	 sub_map2.src="http://www.hoffler.co.uk/images/menu/home-off.png"
	 sub_map3.src="http://www.hoffler.co.uk/images/menu/stock-on.png"
	 sub_map4.src="http://www.hoffler.co.uk/images/menu/stock-off.png"
	 sub_map5.src="http://www.hoffler.co.uk/images/menu/featured-on.png"
	 sub_map6.src="http://www.hoffler.co.uk/images/menu/featured-off.png"
	 	 
	 	 
	 }
	 else{
	 sub_map1=""
	 sub_map2=""
	 sub_map3=""
	 sub_map4=""
	 sub_map5=""
	 sub_map6=""
	 
		
	 	 
	 document.home=""
	 document.stock=""
	 document.machines=""
	 	 
	 }