var errorCounter = 0;
var gcErrorMsg = false;
var nextElement;

// Method to focus on next field by pressing Enter
function proceedOnEnter(GiftCardField, e) {
	var keynum;
	if (window.event) {
		// IE
		keynum = e.keyCode;
	} else if (e.which) {
		// Netscape/Firefox/Opera
		keynum = e.which;
	}

	// Code for Enter
	if (keynum == 13) {
		var fieldName = GiftCardField.name;
		var fieldId = GiftCardField.id;
		var i = fieldId.charAt(fieldId.length - 1);
		var nextRow = Number(i) + 1;
		var gcNumArray = document.getElementsByName("gcnum");
		if (fieldName == "gcnum") {
			nextElement = document.getElementById("gcpin" + i);
		}
		if (fieldName == "gcpin") {
			if (nextRow == gcNumArray.length) {
				nextElement = document[lookupIdByTagId("frmShippingCheckout")][lookupIdByTagId("shipping")][0];
			} else {
				nextElement = document.getElementById("gcnum" + nextRow);
			}
		}
		if (window.event) {
			// IE
			GiftCardField.blur();
		} else if (e.which) {
			// Netscape/Firefox/Opera
			validateGCNumber();
			return false;
		}
	}
}

function validateGCNumber() {
	var errorMessages = new Array();
	errorMessages
			.push("Your Gift Card and/or PIN (Personal Identification Number) is invalid.  Please resubmit your Gift Card information.");
	var gcNumArray = document.getElementsByName("gcnum");
	var gcPinArray = document.getElementsByName("gcpin");
	var gcnumPattern = /^\d{16}$/;
	var gcpinPattern = /^\d{4}$/;
	for (i = 0; i < gcNumArray.length; i++) {
		var gcnum = gcNumArray[i].value;
		var gcpin = gcPinArray[i].value;
		if (gcnum.length == 0) {
			// If they didn't entered giftcard number
			continue;
		} else if (gcnum.length < 16) {
			// If they entered giftcard number and less than 16 digits
			if ($('#labelerrgcnum' + i).length == 0) {
				$('#gclabelnum' + i)
						.prepend(
								'<span style="color:#C00;" id="labelerrgcnum' + i + '">>>&nbsp;</span>');
				this.showErrorMessage(errorMessages);
			}
		} else if (gcnum.length == 16 && (gcnumPattern.test(gcnum) == false)) {
			// If they entered giftcard number and non-numeric values in
			// giftcard number
			if ($('#labelerrgcnum' + i).length == 0) {
				$('#gclabelnum' + i)
						.prepend(
								'<span style="color:#C00;" id="labelerrgcnum' + i + '">>>&nbsp;</span>');
				this.showErrorMessage(errorMessages);
			}
		} else if (gcnum.length == 16 && (gcnumPattern.test(gcnum) == true)) {
			// If they entered giftcard number and numbers only
			$("#labelerrgcnum" + i).detach();
			$("#errorMessage").html('');
			if (gcpin.length == 0) {
				// If they didn't entered giftcard pin
				continue;
			} else if (gcpin.length < 4) {
				// If they entered giftcard pin and less than 4 digits
				if ($('#labelerrgcpin' + i).length == 0) {
					$('#gclabelpin' + i)
							.prepend(
									'<span style="color:#C00;" id="labelerrgcpin' + i + '">>>&nbsp;</span>');
					this.showErrorMessage(errorMessages);
				}
			} else if (gcpin.length == 4 && (gcpinPattern.test(gcpin) == false)) {
				// If they entered giftcard pin and non-numeric values in
				// giftcard pin
				if ($('#labelerrgcpin' + i).length == 0) {
					$('#gclabelpin' + i)
							.prepend(
									'<span style="color:#C00;" id="labelerrgcpin' + i + '">>>&nbsp;</span>');
					this.showErrorMessage(errorMessages);
				}
			} else if (gcpin.length == 4 && (gcpinPattern.test(gcpin) == true)) {
				$("#labelerrgcpin" + i).detach();
				$("#errorMessage").html('');
			}
		}
	}
}

function showErrorMessage(errorMessages) {
	var errorHeader = '<div class="errorHeader">Please correct the following errors before continuing:</div>';
	var errorBody = '<div class="errorMessages">' + errorMessages.join("\n") + '</div>';
	var errorZone = '<div class="errorZone">' + errorHeader + errorBody
			+ '</div>';
	$("#errorMessage").html(errorZone);
}