function OpenPopupWindow(url, width, height) {
    day = new Date(); id = day.getTime();
    eval("page" + id + " = window.open(url, '" + 'popup' + "','toolbar=0, scrollbars=0, location=0, statusbar=0, resizable=yes, menubar=0, width=' + width + ', height=' + height + ', left = 50, top = 50');");
}
function OpenCharter()
{
	OpenPopupWindow('/customer-charter.aspx', 760, 440);
}
function OpenPaymentHelp() {
    OpenPopupWindow('/payment-help.aspx', 780, 540);
}
function OpenRewardsTerms() {
    OpenPopupWindow('/rewards-terms.aspx', 500, 540);
} 
function OpenGuidePriceFaq() {
    OpenPopupWindow('/guide-price-help.aspx', 500, 540);
}