function get_random() {
// Make sure that random()*X) has the correct number.
var ranNum= Math.floor(Math.random()*3);
return ranNum;
}
var whichImg=get_random();
function show_image() {
// Make sure that Array(X) has the number of images
var img=new Array(3)
img[0]="http://www.pvcc.edu/img/bg/spr_home_3.jpg";
img[1]="http://www.pvcc.edu/img/bg/spr_home_6.jpg";
img[2]="http://www.pvcc.edu/img/bg/spr_home_8.jpg";
 // Here the actual displaying of the image is taking place.
document.write("<div id='righttop2' style='background:url(");
document.write(img[whichImg]);
document.write(") #ffffff no-repeat;'>");
}