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/home.jpg'
     button2.src = 'images/home-hvr.jpg'
	 
	 button3.src = 'images/about.jpg'
     button4.src = 'images/about-hvr.jpg'
	 
	 button5.src = 'images/excerpt.jpg'
     button6.src = 'images/excerpt-hvr.jpg'
	 
	 button7.src = 'images/dedication.jpg'
     button8.src = 'images/dedication-hvr.jpg'
}