var preload1 = false;
var preload2 = false;

var target=Math.round(100*Math.random());
if (target <= 55) var promo_num = 1;
if (target <= 85 & target > 55) var promo_num = 2;
if (target > 85) var promo_num = 3;

function writePromoCSS()
{
	document.write('<style type="text/css"><!--	TD.promo { background-image: url(images/img_'+promo_num+'.jpg);	background-position:left; background-repeat:no-repeat; } //--></style>');

}
function writePromoTitle()
{
	document.write ('<img src="images/img_'+promo_num+'_title.gif" width="380" height="23">');
}

function changeImage(id,action)
{
 	if(document.images && preload1 && preload2) document.images[id].src = eval( id + action + ".src");
    	return true;
}