if (document.images) {
     button1 = new Image
     button2 = new Image

     button1.src = 'images/index1.png'
     button2.src = 'images/index2.png'

     button3 = new Image
     button4 = new Image

     button3.src = 'images/about1.png'
     button4.src = 'images/about2.png'

     button5 = new Image
     button6 = new Image

     button5.src = 'images/artwork1.png'
     button6.src = 'images/artwork2.png'

     button7 = new Image
     button8 = new Image

     button7.src = 'images/webdesign1.png'
     button8.src = 'images/webdesign2.png'

     button9 = new Image
     button10 = new Image

     button9.src = 'images/links1.png'
     button10.src = 'images/links2.png'

     button11 = new Image
     button12 = new Image

     button11.src = 'images/contact1.png'
     button12.src = 'images/contact2.png'
 }