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

	 
	 
     button1.src = 'images/learn.jpg'
     button2.src = 'images/learn-hvr.jpg'
	 
	 button3.src = 'images/12031.jpg'
     button4.src = 'images/12031-hvr.jpg'
	 
	 button5.src = 'images/128.jpg'
     button6.src = 'images/128-hvr.jpg'
	 
	 button7.src = 'images/128-1.jpg'
     button8.src = 'images/128-1-hvr.jpg'
}