/*
Versions:
1.10  24-03-2009  (A.Ianovski) - Added . isValidUserName()
*/

String.prototype.trim = function () {
    return this.replace(/^\s*/, "").replace(/\s*$/, "");
}
function checkEmail(inputvalue){
    var pattern=/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;
    if(pattern.test(inputvalue)){
		return true;
    }else{
		return false;
    }
}

 function trim(s)
  {
       while (s.substring(s.length-1,s.length) == ' ')
       {
            s = s.substring(0,s.length-1);
       }
       return s;
 }

function isAlphabet(val)
{
	var alphaExp = /^[a-zA-Z]+$/;
	if(val.match(alphaExp))
	{
		return true;
	}
	else
	{
		return false;
	}
}
function isValidUserName(val)
{
	return val.search(/[^a-zA-Z^'^-]/) < 0;
}
function isAlphanumeric(val)
{
	var alphaExp = /^[0-9a-zA-Z]+$/;
	if(val.match(alphaExp))
	{
		return true;
	}
	else
	{

		return false;
	}
}
function isNumeric(val)
{
	var numericExpression = /^[0-9]+$/;
	if(val.match(numericExpression))
	{
		return true;
	}
	else
	{

		return false;
	}
}

function isNumber(str) {
isPrice = /^\d+\.\d{2}$/;
return isPrice.test( str );
}

function checkBlankspace(val)
{
   var blank = /^[ ]+$/


   if(!val.match(blank))
	{
		return true;
	}

	else
	{

		return false;
	}


}

function isEmpty( str ){
    var strRE = /^[\s ]*$/gi;
    return strRE.test( str );
}



/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
/* This can  be customised */
var minYear=1900;
var maxYear=2100;

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) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

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){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}


//function chk_donation_amt()
//{
//	alert('sjhdjsdy');
//	var  DonationAmount = document.getElementById('DonationAmount').value;	
//	alert(DonationAmount);
//	if(DonationAmount == '' || isNumeric(DonationAmount) !=true)
//	{
//		alert('Please Insert Amount');
//		document.getElementById('DonationAmount').focus();
//		return false;
//	}
//
//}