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

     button1.src = 'upload/images/pic1a.jpg'
     button2.src = 'upload/images/pic1b.jpg'
	 
	 button3.src = 'upload/images/pic2a.jpg'
     button4.src = 'upload/images/pic2b.jpg'
	 
	 button5.src = 'upload/images/pic3a.jpg'
     button6.src = 'upload/images/pic3b.jpg'
	 
	 button7.src = 'upload/images/pic4a.jpg'
     button8.src = 'upload/images/pic4b.jpg'
	 
	 button9.src = 'upload/images/pic5a.jpg'
     button10.src = 'upload/images/pic5b.jpg'
}