var adArray = new makeArray('16','17','18');

//var adArray = new makeArray('9');

function makeArray(){
    this.length = makeArray.arguments.length 
        for (var i = 0; i < this.length; i++)
        this[i + 1] = makeArray.arguments[i]
    }

function randNum (num) {
    var now = new Date();
    var rand = Math.round(num * Math.cos(now.getTime()));
    if (rand < 0) rand = - rand; if (rand == 0) rand++;
    return rand;
    }
	
document.write('<table border=0 cellpadding=0 cellspacing=0 width="100%"><tr><td><a href="http://www.davecamarillo.com" target="_blank"><img src="images/front_page/');
	
document.write (adArray[randNum(adArray.length)]);

document.write('.gif" alt="Learn from the Best" border="0"></a></tr></table>');