function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=100,height=100,screenX=150,screenY=150,top=150,left=150')
}

function submit_cart_form() {
    document.forms['cart_quantity'].submit();
 }

function submit_checkout() {
    document.forms['checkout_address'].submit();
 }

function submit_checkout_payment() {

  var error = 0;
  var error_message = "Errors have occured during the process of your form.\n\nPlease make the following corrections:\n\n";
  var payment_value = null;
  if (document.checkout_payment.payment.length) {
    for (var i=0; i<document.checkout_payment.payment.length; i++) {
      if (document.checkout_payment.payment[i].checked) {
        payment_value = document.checkout_payment.payment[i].value;
      }
    }
  } else if (document.checkout_payment.payment.checked) {
    payment_value = document.checkout_payment.payment.value;
  } else if (document.checkout_payment.payment.value) {
    payment_value = document.checkout_payment.payment.value;
  }

  if (payment_value == "authorizenet") {
    var cc_owner = document.checkout_payment.authorizenet_cc_owner.value;
    var cc_number = document.checkout_payment.authorizenet_cc_number.value;
    if (cc_owner == "" || cc_owner.length < 3) {
      error_message = error_message + "* The owner's name of the credit card must be at least 3 characters.\n";
      error = 1;
    }
    if (cc_number == "" || cc_number.length < 10) {
      error_message = error_message + "* The credit card number must be at least 10 characters.\n";
      error = 1;
    }
  }

  if (payment_value == null) {
    error_message = error_message + "* Please select a payment method for your order.\n";
    error = 1;
  }

  if (error == 1) {
    alert(error_message);
   } else {
    document.forms['checkout_payment'].submit();
  }
    
 }

function session_win() {
  window.open("<?php echo tep_href_link(FILENAME_INFO_SHOPPING_CART); ?>","info_shopping_cart","height=460,width=430,toolbar=no,statusbar=no,scrollbars=yes").focus();
}