if (document.images) {
   
     button1 = new Image
     button2 = new Image
	 
     button3 = new Image
     button4 = new Image
	 
     button5 = new Image
     button6 = new Image
	 
     button7 = new Image
     button8 = new Image
	 
     button9 = new Image
     button10 = new Image
	 
     button11 = new Image
     button12 = new Image
	 
     button13 = new Image
     button14 = new Image
	 
     button15 = new Image
     button16 = new Image
	 
     button17 = new Image
     button18 = new Image
	 
     button19 = new Image
     button20 = new Image
	 
     button21 = new Image
     button22 = new Image
	 
     button23 = new Image
     button24 = new Image
	 
	 
	 	 
     button1.src = 'images/home.jpg'
     button2.src = 'images/home-hvr.jpg'
	 
	 button3.src = 'images/start.jpg'
     button4.src = 'images/start-hvr.jpg'
	 
     button5.src = 'images/service.jpg'
     button6.src = 'images/service-hvr.jpg'
	 
     button7.src = 'images/fees.jpg'
     button8.src = 'images/fees-hvr.jpg'
	 
     button9.src = 'images/patents.jpg'
     button10.src = 'images/patents-hvr.jpg'
	 
     button11.src = 'images/request.jpg'
     button12.src = 'images/request-hvr.jpg'
	 
     button13.src = 'images/contact.jpg'
     button14.src = 'images/contact-hvr.jpg'
	 
     button15.src = 'images/sitemap.jpg'
     button16.src = 'images/sitemap-hvr.jpg'
	 
     button17.src = 'images/about.jpg'
     button18.src = 'images/about-hvr.jpg'
	 
     button19.src = 'images/patents1.jpg'
     button20.src = 'images/patents1-hvr.jpg'
	 
     button21.src = 'images/trade.jpg'
     button22.src = 'images/trade-hvr.jpg'
	 
     button23.src = 'images/copyright.jpg'
     button24.src = 'images/copyright-hvr.jpg'
 }