/* ShadowValidation */
function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57)){
		   if (charCode == 32){
		     alert('Bitte verwenden Sie keine Leerzeichen zwischen den Zahlen');  //Please don\'t use spaces between numbers
		     return false; 
			 }
         //   return false;
		 alert('Bitte geben Sie nur Zahlen'); //Please enter numbers only
		 return false;
		 }

         return true;
      }

function Validate(objForm) {
	var arrValidated=new Array();
	
	for (var i=0; i<objForm.elements.length; i++) {
		var element=objForm.elements[i];
		var elName=element.name;
		if ((!elName)||(elName.length == 0)||(arrValidated[elName]))
			continue;
		arrValidated[elName] = true;
		var validationType = element.getAttribute("validate");
		if ((!validationType)||(validationType.length == 0))
			continue;
		var strMinLength=element.getAttribute("minlength");
		var strinputName=element.getAttribute("name");
		var strOnKeyPress=element.getAttribute("onkeypress");
		var strMessages=element.getAttribute("msg");
		if (!strMessages)
			strMessages = "";
		var arrMessages = strMessages.split("|");
		var arrValidationTypes = validationType.split("|");		
		for (var j=0; j<arrValidationTypes.length; j++) {
			var curValidationType = arrValidationTypes[j];
			var blnValid=true;
			
			switch (curValidationType) {
				case "not_empty":
					blnValid = ValidateNotEmpty(element);
					break;
				case "integer":
					blnValid = ValidateInteger(element);
					break;
				case "number":
					blnValid = ValidateNumber(element);
					break;
				case "email":
					blnValid = ValidateEmail(element);
					break;
				default:
					try {
						blnValid = eval(curValidationType+"(element)");
					}
					catch (ex) {
						blnValid = true;
					}
			}

			if (blnValid == false) {
				var message="Ungültiger Wert für "+element.name;
				if ((j < arrMessages.length)&&(arrMessages[j].length > 0))
					message = arrMessages[j];
				InsertError(element, message);
				if ((typeof element.focus == "function")||(element.focus)) {
					if(element.type=="select-one") element.value="0"; else element.value="";
					element.focus();
				}
				return false;
			}
			else
			if (strMinLength){
				if (GetElementValue(element).length < strMinLength){
					if(strOnKeyPress) strData = ' Nummern';
					else strData =' Zeichen';
					alert("die mindestens "+ strMinLength + strData); // give atleast 5 characters/numbers
					strValue = element.value;
					element.value="";
					element.value=strValue;
					element.focus();
					return false;
				}
			}
			ClearError(element);
		}
		if(strinputName=='confirmpasswd'){
		 	if(objForm.passwd.value != objForm.confirmpasswd.value){
				alert('Ihre Passwörter stimmen nicht mit');//your passwords do not match
				objForm.passwd.value = "";
				objForm.confirmpasswd.value = "";
				objForm.passwd.focus();
				return false;
			}
		}
		if(strinputName=='cardno') return checkCreditCard(objForm);
	}
	return true;
}

function ValidateNotEmpty(objElement) {
	var strValue = GetElementValue(objElement);
	return (strValue.length > 0);
}

function ValidateInteger(objElement) {
	var strValue = GetElementValue(objElement);
	return (!isNaN(parseInt(strValue)));
}

function ValidateNumber(objElement) {
	var strValue = GetElementValue(objElement);
	return (!isNaN(parseFloat(strValue)));
}

function ValidateEmail(objElement) {
	var strValue = GetElementValue(objElement);
	if (strValue.length < 5)
		return false;
	var arrTemp=strValue.split("@");
	if (arrTemp.length != 2)
		return false;
	var strLeftPart = arrTemp[0];
	var strRightPart = arrTemp[1];
	if ((strLeftPart.length == 0)||(strRightPart.length == 0))
		return false;
	arrTemp = strRightPart.split(".");
	if (arrTemp.length < 2)
		return false;
	for (var i=0; i<arrTemp.length; i++) {
		if (arrTemp[i].length == 0)
			return false;
	}
	return true;
}

function GetElementValue(objElement) {
	var result="";
	switch (objElement.type) {
		case "text":
		case "hidden":
		case "textarea":
		case "password":
			result = objElement.value;
			break;
		case "select-one":
		case "select":
			if (objElement.selectedIndex > 0)
				result = objElement.options[objElement.selectedIndex].value;
			break;
		case "radio":
		case "checkbox":
			for (var i=0; i<objElement.form.elements.length; i++) {
				if (objElement.form.elements[i].name == objElement.name) {
					if (objElement.form.elements[i].checked)
						result += objElement.form.elements[i].value+",";
				}
			}
			break;
	}
	return result;
}

function InsertError(element, strMessage) {
	if ((element.form.getAttribute("show_alert")) && (element.form.getAttribute("show_alert") != "0")) {
		alert(strMessage);
		return;
	}
	
	var strSpanID = element.name+"_val_error";
	var objSpan = document.getElementById(strSpanID);
	if (!objSpan) {
		if ((element.type == "radio")||(element.type == "checkbox")) {
			for (var i=0; i<element.form.elements.length; i++) {
				if (element.form.elements[i].name == element.name) {
					element = element.form.elements[i];
				}
			}
		}
		objSpan = document.createElement("span");
		objSpan.id = strSpanID;
		objSpan.className = "validation_error";
		var nodeAfter=0;
		var nodeParent = element.parentNode;
		for (var i=0; i<nodeParent.childNodes.length; i++) {
			if (nodeParent.childNodes[i] == element) {
				if (i < (nodeParent.childNodes.length-1))
					nodeAfter = nodeParent.childNodes[i+1];
				break;
			}
		}
		if ((!nodeAfter)&&(nodeParent.parentNode)) {
			nodeParent = nodeParent.parentNode;
			for (var i=0; i<nodeParent.childNodes.length; i++) {
				if (nodeParent.childNodes[i] == element.parentNode) {
					if (i < (nodeParent.childNodes.length-1))
						nodeAfter = nodeParent.childNodes[i+1];
					break;
				}
			}
		}
		if (nodeAfter)
			nodeParent.insertBefore(objSpan, nodeAfter);
		else
			document.body.appendChild(objSpan);
	}
	objSpan.innerHTML = strMessage;
}

function ClearError(element) {
	var strSpanID = element.name+"_val_error";
	var objSpan = document.getElementById(strSpanID);
	if (objSpan) {
		objSpan.innerHTML = "";
	}
}

function checkCreditCard(objForm) {
	cardnumber = objForm.cardno.value
	cardname = objForm.cardtype.value
  var cards = new Array();
  cards [0] = {name: "Visa", 
               length: "13,16", 
               prefixes: "4",
               checkdigit: true};
  cards [1] = {name: "MasterCard", 
               length: "16", 
               prefixes: "51,52,53,54,55",
               checkdigit: true};
  cards [2] = {name: "American Express", 
               length: "15", 
               prefixes: "34,37",
               checkdigit: true};
  cards [3] = {name: "Diners Club", 
               length: "14,16", 
               prefixes: "300,301,302,303,304,305,36,38,55",
               checkdigit: true};
  cards [4] = {name: "Discover", 
               length: "16", 
               prefixes: "6011,650",
               checkdigit: true};

// Establish card type
  var cardType = -1;
  for (var i=0; i<cards.length; i++) {

    // See if it is this card (ignoring the case of the string)
    if (cardname.toLowerCase () == cards[i].name.toLowerCase()) {
      cardType = i;
      break;
    }
  }

// If card type not found, report an error
  if (cardType == -1) {
//     ccErrorNo = 0;
	 alert('Unknown Card Type');
     return false; 
  }
   
  // Ensure that the user has provided a credit card number
  if (cardnumber.length == 0)  {
//     ccErrorNo = 1;
	 alert('Nein, die Karten-Nummer'); //No Card Number provided
     return false; 
  }
    
  // Now remove any spaces from the credit card number
  cardnumber = cardnumber.replace (/\s/g, "");
  
  // Check that the number is numeric
  var cardNo = cardnumber
  var cardexp = /^[0-9]{13,19}$/;
  if (!cardexp.exec(cardNo))  {
//     ccErrorNo = 2;
	  alert('Credit Card-Nummer hat ungültiges Format'); //Credit Card Number has invalid format
tmpvalue = objForm.cardno.value;
objForm.cardno.value="";
objForm.cardno.focus();
objForm.cardno.value = tmpvalue;
     return false; 
  }

  // Now check the modulus 10 check digit - if required
  if (cards[cardType].checkdigit) {
    var checksum = 0;                                  // running checksum total
    var mychar = "";                                   // next char to process
    var j = 1;                                         // takes value of 1 or 2
  
    // Process each digit one by one starting at the right
    var calc;
    for (i = cardNo.length - 1; i >= 0; i--) {
      calc = Number(cardNo.charAt(i)) * j;
      if (calc > 9) {
        checksum = checksum + 1;
        calc = calc - 10;
      }
      checksum = checksum + calc;
      if (j ==1) {j = 2} else {j = 1};
    } 
  
    if (checksum % 10 != 0)  {
//     ccErrorNo = 3;
     alert('Credit Card-Nummer ist ungültig!'); //Credit Card Number is invalid !!
tmpvalue = objForm.cardno.value;
objForm.cardno.value="";
objForm.cardno.focus();
objForm.cardno.value = tmpvalue;
     return false; 
    }
  }  

  // The following are the card-specific checks we undertake.
  var LengthValid = false;
  var PrefixValid = false; 
  var undefined; 

  // We use these for holding the valid lengths and prefixes of a card type
  var prefix = new Array ();
  var lengths = new Array ();
    
  // Load an array with the valid prefixes for this card
  prefix = cards[cardType].prefixes.split(",");
      
  // Now see if any of them match what we have in the card number
  for (i=0; i<prefix.length; i++) {
    var exp = new RegExp ("^" + prefix[i]);
    if (exp.test (cardNo)) PrefixValid = true;
  }
      
  // If it isn't a valid prefix there's no point at looking at the length
  if (!PrefixValid) {
  // ccErrorNo = 3;
     alert('Credit Card-Nummer ist ungültig!'); //Credit Card Number is invalid !!
tmpvalue = objForm.cardno.value;
objForm.cardno.value="";
objForm.cardno.focus();
objForm.cardno.value = tmpvalue;
     return false; 
  }
    
  // See if the length is valid for this card
  lengths = cards[cardType].length.split(",");
  for (j=0; j<lengths.length; j++) {
    if (cardNo.length == lengths[j]) LengthValid = true;
  }
  
  // See if all is OK by seeing if the length was valid. We only check the 
  // length if all else was hunky dory.
  if (!LengthValid) {
//     ccErrorNo = 4;
     alert('Credit Card Number hat unangebracht Anzahl der Stellen');  //Credit Card Number has inappropriate number of digits
tmpvalue = objForm.cardno.value;
objForm.cardno.value="";
objForm.cardno.focus();
objForm.cardno.value = tmpvalue;
     return false; 
  };   
// The credit card is in the required format.
return true;
  
}