function isUrl(s)
 {
	var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	return regexp.test(s);
}

function Left(str, n)
{
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}

function Right(str, n)
{
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}

function SetCookie(cookieName,cookieValue,nDays)
{
 if(nDays != 0)
 {
  var today = new Date();
  var expire = new Date();
  if (nDays==null || nDays==0) nDays=1;
  expire.setTime(today.getTime() + 3600000*24*nDays);
  document.cookie = cookieName+"="+(cookieValue) + ";expires="+expire.toGMTString();
 }
 else
 {
  document.cookie = cookieName+"="+(cookieValue);
 }

}

function checkEnter(evt)
{
    var charCode = (window.event)?event.keyCode:evt.which;   
    if (charCode == 13)
    {
     document.onKeyPress = "";
     dosave();
    }
}

function checkEnterKey(evt)
{
    var charCode = (window.event)?event.keyCode:evt.which;   
    if (charCode == 13)
    {
     document.onKeyPress = "";
     doSearchKey();
    }
}

function checkEnterNum(evt)
{
    var charCode = (window.event)?event.keyCode:evt.which;   
    if (charCode == 13)
    {
     document.onKeyPress = "";
     doSearchNum();
    }
}

function trim(s) {
  while (s.substring(0,1) == ' ') {
    s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
    s = s.substring(0,s.length-1);
  }
  return s;
}
function notChecked( box )
{
    if( box.checked ){
        return false;
    }
    else{
        return true;
    }
} 


function isValidURL(url) {
	var urlRegxp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	if (urlRegxp.test(url) != true) {
		return false;
	} else {
		return true;
	}
}

function ckEnter(evt)
{ 	
    var charCode = (window.event)?event.keyCode:evt.which;   
    if (charCode == 13)
    {
     document.onKeyPress = "";
    }
}

function checkemail(EmailValue)
{
 var str=EmailValue;
 var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
 if (filter.test(str))
 {
  testresults=true;
 }
 else
 {
  testresults=false;
 }
 return (testresults);
}

function NumericCheck(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

function NumericCheckPhone(sText)
{
   var ValidChars = "0123456789-";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

function NumericCheckCSI(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

function NumericCheckTax(sText)
{
   var ValidChars = "0123456789-";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

function NumericCheckInt(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

function isValidCreditCard(type, ccnum)
{
   if (type == 1)
   {
      // Visa: length 16, prefix 4, dashes optional.
      var re = /^4\d{3}-?\d{4}-?\d{4}-?\d{4}$/;
   }
   else if (type == 2)
   {
      // Mastercard: length 16, prefix 51-55, dashes optional.
      var re = /^5[1-5]\d{2}-?\d{4}-?\d{4}-?\d{4}$/;
   }
   else if (type == 3)
   {
      // Discover: length 16, prefix 6011, dashes optional.
      var re = /^6011-?\d{4}-?\d{4}-?\d{4}$/;
   }
   else if (type == 4)
   {
      // American Express: length 15, prefix 34 or 37.
      var re = /^3[4,7]\d{13}$/;
   }
   //else if (type == "Diners")
   //{
   //   // Diners: length 14, prefix 30, 36, or 38.
   //   var re = /^3[0,6,8]\d{12}$/;
   //}
   
   if (!re.test(ccnum)) return false;
   // Remove all dashes for the checksum checks to eliminate negative numbers
   ccnum = ccnum.split("-").join("");
   // Checksum ("Mod 10")
   // Add even digits in even length strings or odd digits in odd length strings.
   var checksum = 0;
   for (var i=(2-(ccnum.length % 2)); i<=ccnum.length; i+=2) {
      checksum += parseInt(ccnum.charAt(i-1));
   }
   // Analyze odd digits in even length strings or even digits in odd length strings.
   for (var i=(ccnum.length % 2) + 1; i<ccnum.length; i+=2) {
      var digit = parseInt(ccnum.charAt(i-1)) * 2;
      if (digit < 10) { checksum += digit; } else { checksum += (digit-9); }
   }
   if ((checksum % 10) == 0) return true; else return false;
}