// Generic Form Validation
var checkObjects	= new Array();
var errors		= "";
var returnVal		= false;
var language		= new Array();
language["header"]	= "Please correct the following data capture problems:"
language["start"]	= "->";
language["field"]	= " Field ";
language["require"]	= " is required";
language["min"]		= " and must consist of at least ";
language["max"]		= " and must not contain more than ";
language["minmax"]	= " and no more than ";
language["chars"]	= " characters";
language["num"]		= " and must contain a number";
language["email"]	= " must contain a valid e-mail address";
language["dte"]		= " must contain a valid date (dd/mm/yyyy)";
language["bd"]		= " must differ at least 15 years";
// -----------------------------------------------------------------------------
// define - Call this function in the beginning of the page. I.e. onLoad.
// n = name of the input field (Required)
// type= string, num, email (Required)
// min = the value must have at least [min] characters (Optional)
// max = the value must have maximum [max] characters (Optional)
// d = (Optional)
// -----------------------------------------------------------------------------

function define(n, type, HTMLname, min, max, d) {
//alert('define')
var p;
var i;
var x;
if (!d) d = document;
	if ((p=n.indexOf("?"))>0&&parent.frames.length) {
	d = parent.frames[n.substring(p+1)].document;
	n = n.substring(0,p);
}
if (!(x = d[n]) && d.all) x = d.all[n];
	for (i = 0; !x && i < d.forms.length; i++) {
		x = d.forms[i][n];
	}
	for (i = 0; !x && d.layers && i < d.layers.length; i++) {
		x = define(n, type, HTMLname, min, max, d.layers[i].document);
		return x;       
	}
	eval("V_"+n+" = new formResult(x, type, HTMLname, min, max);");
	checkObjects[eval(checkObjects.length)] = eval("V_"+n);
}

function formResult(form, type, HTMLname, min, max) {
	this.form = form;
	this.type = type;
	this.HTMLname = HTMLname;
	this.min  = min;
	this.max  = max;
}

function validate() {
diff = new Date();
if (checkObjects.length > 0) {
	errorObject = "";
	for (i = 0; i < checkObjects.length; i++) {
		validateObject = new Object();
		validateObject.form = checkObjects[i].form;
		validateObject.HTMLname = checkObjects[i].HTMLname;
		validateObject.val = checkObjects[i].form.value;
		validateObject.len = checkObjects[i].form.value.length;
		validateObject.min = checkObjects[i].min;
		validateObject.max = checkObjects[i].max;
		validateObject.type = checkObjects[i].type;
		if (validateObject.type == "num" || validateObject.type == "string") {
			if ((validateObject.type == "num" && validateObject.len <= 0) || (validateObject.type == "num" && isNaN(validateObject.val))) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['num'] + "\n";
			} else if (validateObject.min && validateObject.max && (validateObject.len < validateObject.min || validateObject.len > validateObject.max)) { 
				errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['min'] + validateObject.min + language['minmax'] + validateObject.max+language['chars'] + "\n";
			} else if (validateObject.min && !validateObject.max && (validateObject.len < validateObject.min)) { 
				errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['min'] + validateObject.min + language['chars'] + "\n";
			} else if (validateObject.max && !validateObject.min &&(validateObject.len > validateObject.max)) { 
				errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['max'] + validateObject.max + language['chars'] + "\n";
			} else if (!validateObject.min && !validateObject.max && validateObject.len <= 0) { 
				errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n";
			}
		} else if (validateObject.type == "dte") {
			// Valid date
			if (!dateValid(validateObject.val)) { 
				errors += language['start'] + language['field'] + validateObject.HTMLname + language['dte'] + "\n"; 
			}
//			else {
//				diff.setTime(Math.abs(validateObject.val));
//				timediff = diff.getTime();
//				years = Math.floor(timediff / (1000 * 60 * 60 * 24 * 7 * 52));
//				timediff -= years * (1000 * 60 * 60 * 24 * 7 * 52);
//		
//				if (timediff < 16)) { 
//					errors += language['start'] + language['field'] + validateObject.HTMLname + language['bd'] + "\n"; 
//				}
//			}
		} else if (validateObject.type == "email") {
			// Checking existense of "@" and ".". 
			// Length of must >= 5 and the "." must 
			// not directly precede or follow the "@"
			//if (validateObject.len > 0 )
				if ((validateObject.val.indexOf("@") == -1) || (validateObject.val.charAt(0) == ".") || (validateObject.val.charAt(0) == "@") || (validateObject.len < 6) || (validateObject.val.indexOf(".") == -1) || (validateObject.val.charAt(validateObject.val.indexOf("@")+1) == ".") || (validateObject.val.charAt(validateObject.val.indexOf("@")-1) == ".")) { 
					errors += language['start'] + language['field'] + validateObject.HTMLname + language['email'] + "\n"; 
			}
		}
	}
}
if (errors) {
	alert(language["header"].concat("\n" + errors));
	errors = "";
	returnVal = false;
	return false;
} else {
	returnVal = true;
	return true;
}
}

function dateValid(strVal) {
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var strSeparatorArray = new Array("-"," ","/",".");
var intElementNr;
var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
strDate = strVal;
if (strDate.length < 1) {
return false;
}
for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
strDateArray = strDate.split(strSeparatorArray[intElementNr]);
if (strDateArray.length != 3) {
err = 1;
return false;
}
else {
strDay = strDateArray[0];
strMonth = strDateArray[1];
strYear = strDateArray[2];
}
booFound = true;
   }
}
if (booFound == false) {
if (strDate.length>5) {
strDay = strDate.substr(0, 2);
strMonth = strDate.substr(2, 2);
strYear = strDate.substr(4);
   }
}
if (strYear.length == 2) {
strYear = '20' + strYear;
}
//strTemp = strDay;
//strDay = strMonth;
//strMonth = strTemp;
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0; i < 12; i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i + 1;
strMonth = strMonthArray[i];
i = 12;
   }
}
if (isNaN(intMonth)) {
err = 3;
return false;
   }
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth > 12 || intMonth < 1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
   }
}
else {
if (intday > 28) {
err = 10;
return false;
      }
   }
}
return true;
}
function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) {
return true;
   }
}
return false;
}