function formValidator()
{
	this.errorList = new Array;
	this.isEmpty = isEmpty;
	this.raiseError = raiseError;
	this.numErrors = numErrors;
	this.displayErrors = displayErrors;
	this.isAlphaNumeric = isAlphaNumeric;
	this.hasNumber = hasNumber;
	this.checkPlz = checkPlz;
	this.isWithinRange = isWithinRange;
	this.validateDate = validateDate;
	this.validateEmail = validateEmail;

}

function isWithinRange(val, min, max)
{
	if (val >= min && val <= max)
	{
		return true;
	}
	else
	{
		return false;
	}	
}

function validateEmail(mail) {
	var emailFilter=/^.+@.+\..{2,3}$/;
	var badCharsString = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (mail.match(badCharsString)) {
		return false;
	}
	return true;
}
function isEmpty(val)
{
	if (val.match(/^\s+$/) || val == "")
	{
		return true;
	}
	else
	{
		return false;
	}	
}
function raiseError(msg)
{
	this.errorList[this.errorList.length] = msg;
}
function numErrors()
{
	return this.errorList.length;
}
function displayErrors()
{
	var errstring ="" ;
	for (x=0; x<this.errorList.length; x++)
	{
		errstring = errstring + this.errorList[x] + "\n";
	}
alert(errstring);
}
function hasNumber(val){

	if (val.match(/[^0-9A-Za-z-]+/))
	{
		return true;
	}
	else
	{
		return false;
	}	
}
function checkPlz(val){
	if (val.match(/[^0-9]+/) || val.length<5)
	{
		return true;
	}
	else
	{
		return false;
	}	
}
function isAlphaNumeric(val)
{
	if (val.match(/^[a-zA-Z0-9]+$/))
	{
		return true;
	}
	else
	{
		return false;
	}	
}

// date function.....



function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	var mythis = new Array;
	for (var i = 1; i <= n; i++) {
		mythis[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {mythis[i] = 30}
		if (i==2) {mythis[i] = 29}
   } 
   return mythis
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){

		return false
	}
	if (strMonth.length<1 || month<1 || month>12){

		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){

		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){

		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){

		return false
	}
return true
}

function validateDate(val){

	if (isDate(val)==false){
		return false
	}
    return true
 }