if (document.images) {
     button1 = new Image
     button2 = new Image
     button1.src = 'Images/TabHome.png'
     button2.src = 'Images/TabHomeH.png'
     button3 = new Image
     button4 = new Image
     button3.src = 'Images/TabEnter.png'
     button4.src = 'Images/TabEnterH.png'
     button5 = new Image
     button6 = new Image
     button5.src = 'Images/TabRules.png'
     button6.src = 'Images/TabRulesH.png'	
     button7 = new Image
     button8 = new Image
     button7.src = 'Images/TabWinners.png'
     button8.src = 'Images/TabWinnersH.png'		
     button9 = new Image
     button10 = new Image
     button9.src = 'Images/BtnSubmit.png'
     button10.src = 'Images/BtnSubmitH.png'		
     button11 = new Image
     button12 = new Image
     button11.src = 'Images/BtnTop.png'
     button12.src = 'Images/BtnTopH.png'		    
 	 }