var theImages1 = new Array() 

theImages1[0] = 'home1_r1_c1a.jpg'
theImages1[1] = 'home1_r1_c1b.jpg'
theImages1[2] = 'home1_r1_c1c.jpg'
theImages1[3] = 'home1_r1_c1d.jpg'

var j = 0
var p = theImages1.length;
var preBuffer1 = new Array()
for (i = 0; i < p; i++){
   preBuffer1[i] = new Image()
   preBuffer1[i].src = theImages1[i]
}
var whichImage1 = Math.round(Math.random()*(p-1));
function showimg1(){
document.write('<img src="_images/'+theImages1[whichImage1]+'" width="741" height="202" border="0">');
}