function OpenLoyaltyCashBackRewardsWindow() 
{
    var url = "/Loyalty_Cash_Back_Rewards.aspx";
    var w = 500;
    var h = 550;
    var str = "left=" + ((screen.availWidth - w) / 2) + ",top=" + ((screen.availHeight - h) / 3)
	    + ",width=" + w  + ",height=" + h
	    + ",toolbar=0,location=0,directories=0,menubar=0,status=0,scrollbars=0,resizable=0,replace=0";
    var openWhatToExpectWindow = window.open(url, "expectWindow", str);
    return false;
}