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
	 button7 = new Image
     button8 = new Image
	 button9 = new Image
     button10 = new Image
	 
	 
	 
     button1n = 'images/off1.jpg'
     button2n = 'images/on1.jpg'
	 
     button3n = 'images/com-off.jpg'
     button4n = 'images/com-on.jpg'
	 
	 button5n = 'images/serv-off.jpg'
     button6n = 'images/serv-on.jpg'
 	
	 button7n = 'images/port-off.jpg'
     button8n = 'images/port-on.jpg'
	 
	 button9n = 'images/con-off.jpg'
     button10n = 'images/con-on.jpg'
 
 }