function Checkfiles(fup)
{
var fileName = fup.value;
var ext = fileName.substring(fileName.lastIndexOf('.') + 1);
if(ext == "txt" || ext == "doc" || ext == "Doc")
{
return true;
}
else
{
return false;
}
}		
function isUrl(s) {
 	var regexp = /http:\/\/[A-Za-z0-9\.-]{3,}\.[A-Za-z]{3}/;
 	return regexp.test(s);
}
function isValidEmails(email)
{
// a very simple email validation checking. 
// you can add more complex email checking if it helps 
    if(email.length <= 0)
	{
	  return true;
	}
    var splitted = email.match("^(.+)@(.+)$");
    if(splitted == null) return false;
    if(splitted[1] != null )
    {
      var regexp_user=/^\"?[\w-_\.]*\"?$/;
      if(splitted[1].match(regexp_user) == null) return false;
    }
    if(splitted[2] != null)
    {
      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
      if(splitted[2].match(regexp_domain) == null) 
      {
	    var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
	    if(splitted[2].match(regexp_ip) == null) return false;
      }// if
      return true;
    }
return false;
}

function funcCheckPhoneNumber(ctrtxtMobile,e){
        if(window.event){
        var strkeyIE = e.keyCode
        if(((strkeyIE >= 48) && (strkeyIE <= 57 ))  || (strkeyIE >= 40) &&
(strkeyIE <= 41 ) || (strkeyIE == 32) || (strkeyIE == 46)||(strkeyIE
== 45) ){}
        else{
    return false;}}
        else{
    var strkeyCode = e.keyCode
    var strCharCode = e.charCode
    if(((strCharCode >= 48) && (strCharCode <= 57 ))  || ((strCharCode
>= 40) && (strCharCode <= 41 )) || (strCharCode == 45)  ||

(strCharCode==32)|| (strkeyCode==37 )|| (strkeyCode==38) ||
(strkeyCode == 46)||(strCharCode==46)||(strkeyCode==8 ) || (strkeyCode
==9 ) ||(strkeyCode==39) || (strkeyCode ==35) || (strkeyCode  ==36) ||
(strkeyCode==9)){}
        else{
    return false;}}
    return true;}
	
	
	
	
	
	
	//Phone
	//phone_no validation function//*****************
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

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++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
var bracket=3
strPhone=trim(strPhone)
if(strPhone.indexOf("+")>1) return false
if(strPhone.indexOf("-")!=-1)bracket=bracket+1
if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
var brchr=strPhone.indexOf("(")
if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}


//Validation On email

function echeck(str)
{
  var at="@"
  var dot="."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  if (str.indexOf(at)==-1)
  {
	return false
  }

  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)
  {
	return false
  }

  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
  {
	return false
  }

  if (str.indexOf(at,(lat+1))!=-1)
  {
	return false
  }

  if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)
  {
	return false
  }

  if (str.indexOf(dot,(lat+2))==-1)
  {
	return false
  }

  if (str.indexOf(" ")!=-1)
  {
	return false
  }
  return true;
}