if (document.images)

{
    button1dark = new Image;
    button1light = new Image;
		button2dark = new Image;
		button2light = new Image;
		button3dark = new Image;
		button3light = new Image;
		button4dark = new Image;
		button4light = new Image;
		
		
		
		button1dark.src = "/images/tireevent.jpg";
		button1light.src = "/images/tireeventr.jpg";
    button2dark.src = "/images/tirephoto.jpg";
    button2light.src = "/images/tirephotor.jpg";
    button3dark.src = "/images/tireform.jpg";
    button3light.src = "/images/tireformr.jpg";
    button4dark.src = "/images/contact1.jpg";
    button4light.src = "/images/contact2.jpg";
   

}
else {
      button1dark = ""
			button1light = ""
      button2dark = ""
			button2light = ""
			button3dark = ""
			button3light = ""
			button4dark = ""
			button4light = ""
			
			
			
			document.button1 = ""
			document.button2 = ""
			document.button3 = ""
			document.button4 = ""
			
			
			}