var preload = new Array('images/b-ProductsOn.gif', 'images/b-OptionsOn.gif', 'images/b-QualityOn.gif', 'images/b-WhereToBuyOn.gif','images/b-TradeShowsOff.gif');

var loader = new Array();
for(var i = 0; i < preload.length; i++){
   loader[i] = new Image();
   loader[i].src = preload[i];
}

function leftPhoto() {
var ar = new Array("<img src='images/LeftColTable.gif' border='0' width='168' height='224' />", 
"<img src='images/LeftColTable2.gif' border='0' width='168' height='224' />", 
"<img src='images/LeftColTable3.gif' border='0' width='168' height='224' />", 
"<img src='images/LeftColTable4.gif' border='0' width='168' height='224' />", 
"<img src='images/LeftColTable5.gif' border='0' width='168' height='224' />");

var num = Math.floor(Math.random() * ar.length);
document.write(ar[num]);
}