if (document.images) {
button1 = new Image
button1r = new Image
button2 = new Imagebutton2r = new Image
button3 = new Image
button3r = new Image
button4 = new Imagebutton4r = new Image
button5 = new Image
button5r = new Image
button6 = new Imagebutton6r = new Image
button7 = new Image
button7r = new Image
button8 = new Imagebutton8r = new Image
button9 = new Image
button9r = new Image
button10 = new Imagebutton10r = new Imagebutton11 = new Imagebutton11r = new Image
button1.src = 'http://www.spurlockassociates.com/images/bridges_off.jpg'
button1r.src = 'http://www.spurlockassociates.com/images/bridges_on.gif' button2.src = 'http://www.spurlockassociates.com/images/roadways_off.jpg' button2r.src = 'http://www.spurlockassociates.com/images/roadways_on.gif' button3.src = 'http://www.spurlockassociates.com/images/structures_off.jpg' button3r.src = 'http://www.spurlockassociates.com/images/structures_on.gif' button4.src = 'http://www.spurlockassociates.com/images/schools_off.jpg' button4r.src = 'http://www.spurlockassociates.com/images/schools_on.gif' button5.src = 'http://www.spurlockassociates.com/images/wildlife_off.jpg' button5r.src = 'http://www.spurlockassociates.com/images/wildlife_on.gif' button6.src = 'http://www.spurlockassociates.com/images/instruments_off.jpg' button6r.src = 'http://www.spurlockassociates.com/images/instruments_on.gif'
 button7.src = 'http://www.spurlockassociates.com/images/satellite_off.jpg' button7r.src = 'http://www.spurlockassociates.com/images/satellite_on.gif' button8.src = 'http://www.spurlockassociates.com/images/laptop_off.jpg' button8r.src = 'http://www.spurlockassociates.com/images/laptop_on.gif' button9.src = 'http://www.spurlockassociates.com/images/plans_off.jpg' button9r.src = 'http://www.spurlockassociates.com/images/plans_on.gif'
button10.src = 'http://www.spurlockassociates.com/images/people_off.jpg'
 button10r.src = 'http://www.spurlockassociates.com/images/people_on.gif' button11.src = 'http://www.spurlockassociates.com/images/sclogo.gif' button11r.src = 'http://www.spurlockassociates.com/images/sclogo2.gif'}