/*
==================================================================
LTrim(string) : Returns a copy of a string without leading spaces.
==================================================================
*/

function LTrim(str)
/*
   PURPOSE: Remove leading blanks from our string.
   IN: str - the string we want to LTrim
*/
{
   var whitespace = new String(" \t\n\r");

   var s = new String(str);

   if (whitespace.indexOf(s.charAt(0)) != -1) {
      // We have a string with leading blank(s)...

      var j=0, i = s.length;

      // Iterate from the far left of string until we
      // don't have any more whitespace...
      while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
         j++;

      // Get the substring from the first non-whitespace
      // character to the end of the string...
      s = s.substring(j, i);
   }
   return s;
}

/*
==================================================================
RTrim(string) : Returns a copy of a string without trailing spaces.
==================================================================
*/

function RTrim(str)
/*
   PURPOSE: Remove trailing blanks from our string.
   IN: str - the string we want to RTrim

*/
{
   // We don't want to trip JUST spaces, but also tabs,
   // line feeds, etc.  Add anything else you want to
   // "trim" here in Whitespace
   var whitespace = new String(" \t\n\r");

   var s = new String(str);

   if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
      // We have a string with trailing blank(s)...

      var i = s.length - 1;       // Get length of string

      // Iterate from the far right of string until we
      // don't have any more whitespace...
      while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
         i--;


      // Get the substring from the front of the string to
      // where the last non-whitespace character is...
      s = s.substring(0, i+1);
   }

   return s;
}

/*
=============================================================
Trim(string) : Returns a copy of a string without leading or trailing spaces
=============================================================
*/
function Trim(str)
{
    return RTrim(LTrim(str));
}

//==============================================================
//******function for validate date in a multiple textbox******//
//==============================================================

function single_textbox_date_validation(textbox1)
{	
//Checking leap year validation
	var mystring = new String(textbox1.value)
 	m=mystring.indexOf("/",0)
	if (parseInt(m)==-1)
 	{
 	m=mystring.indexOf("-",0)
 	}
 	mm=mystring.slice(0,m)
	
	d=mystring.indexOf("/",m+1)
  	if (parseInt(d)==-1)
 	{
  	d=mystring.indexOf("-",m+1)
 	}
	dd=mystring.slice(m+1,d)

	yyyy=mystring.slice(d+1,mystring.length)	
	if ((isNaN(mm))||(mm.length>2)||parseInt(mm)> 12|| mm<1)
  	{
  	alert("Invalid month");
	return false;
  	}

	if ((isNaN(dd)) || (dd.length>2) || parseInt(dd)>31 || dd<1)
  	{
  	alert("Invalid day");
	 return false;
  	}

	if ((isNaN(yyyy))||(yyyy.length>4))
  	{
  	alert("Invalid year");
	//textbox1.focus();
  	return false;
  	}
	
	var monthInt=+(parseInt(mm))
	if (monthInt==4)
	{
		var month="April"
	}
	if (monthInt==6)
	{
		var month="June"
	}
	if (monthInt==9)
	{
		var month="September"
	}
	if (monthInt==11)
	{
		var month="November"
	}
	if ((parseInt(yyyy)%400==0)||(!((parseInt(yyyy)%100==0)&&(parseInt(yyyy)%4==0)) && (parseInt(yyyy)%4==0)))
	{	
		//Leap Year
		if ((parseInt(mm)==2)&& (parseInt(dd)>29)) //februry
		{
			alert("Day of Februry month in a leap year should not be greater than 29")
			textbox1.focus();
			return false;
		}
	}
	else
	{	
		//Simple Year
		if ((parseInt(mm)==2)&& (parseInt(dd)>28)) //februry
		{
			alert("Day of Februry month in a simple year should not be greater than 28")
			textbox1.focus();
			return false;
		}
		
	}
	if (((parseInt(mm)==4) || (parseInt(mm)==6) || (parseInt(mm)==9) || (parseInt(mm)==11)) && (parseInt(dd)>30))
	{	  //month=april		      month=June         month=September	  month=November				
		alert("In " +month+ " month day should not be greater than 30")
		textbox1.focus();
		return false;
	}
	
return true;
}


/*
=========================================
SPECIAL CHARACTER VALIDATION IN STRINGS
=========================================
*/

function check_special_char(obj,nam)
{
var iChars = "!@#$%^&*()+=-[]\\\';,./{}|\":<>?";

  for (var i = 0; i < obj.value.length; i++){
  	if (iChars.indexOf(obj.value.charAt(i)) != -1) {
  	alert (nam + " has special characters. \nThese are not allowed.\n Please remove them and try again.");
  	return false;
  	}
  }
return true;
}

/*
============================================
SPECIAL CHARACTER VALIDATION IN FLOAT VALUES
============================================
*/
	  
function check_special_numeric(obj,nam)
{
var iChars = "!@#$%^&*()+=-[]\\\';,/{}|\":<>?";

  for (var i = 0; i < obj.value.length; i++){
  	if (iChars.indexOf(obj.value.charAt(i)) != -1) {
  	alert (nam + " has special characters. \nThese are not allowed.\n Please remove them and try again.");
  	return false;
  	}
  }
return true;
}

/*
============================================
SPECIAL CHARACTER VALIDATION IN FLOAT VALUES
============================================
*/
	  
function check_special(obj,nam)
    {
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

   if (obj.length == 0) return false;

   for (i = 0; i < obj.length &&  blnResult == true; i++)
      {
      strChar = obj.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }
   
/*
============================================
SPECIAL CHARACTER VALIDATION IN DATE VALUE
============================================
*/   

function check_special_date(obj,nam)
{
var flag=1;
var iChars = "!@#$%^&*()+=-[]\';,.{}|\":<>?";

  for (var i = 0; i < obj.value.length; i++){
  	if (iChars.indexOf(obj.value.charAt(i)) != -1) {
  	alert (nam + " has special characters. \nThese are not allowed.\n Please remove them and try again.");
        flag=0;
  	return false;
  	}
  
  }
      return true;  
}

/*==================================
DATE VALIDATION IN SINGLE TEXT BOX
====================================*/

function check_date(obj,nam)	 
{
var er=true;
er=check_special_date(obj,nam);
if (er==false)
   return false;	
if (obj.value.length > 0)
{
var dtCh= "/";
var minYear=1990;
var maxYear=9999;

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
}

	var dt=obj;
	if (isDate(dt.value)==false){
		er=false
		if (er==false)
		{
		return er
	}
   }
  } 
  }
//----------**end of function for validate date in a single textbox**----------//

/* =============================
FUNCTION RETURNS TRUE OR FALSE
===============================*/

function chkErr(er,obj)
{
  if(er==false)
      return(false);
  if(obj==false)
    {
      return(false);
    }
  else
  {
    return(true);
  }  
}

/*===================================================
FUNCTION CHECKS FOR VALID LENGTH OF CHARACTER FIELDS
===================================================*/

function chkval(obj,val,Nam)
{
 var str =Trim(obj.value);
 var er=true;
 er=check_special_char(obj,Nam);
 if (er==false)
    return false;
if (str.length > val) 
		  { 
		   alert(Nam + " length should be <= " + val);
		   return false;
		  }  
}

/*===================================================
FUNCTION CHECKS FOR VALID LENGTH OF NUMERIC FIELDS
===================================================*/

function chkval1(obj,val,Nam)
{
var str =Trim(obj.value);
 var er=true;
 er=chkNmeric(obj,Nam);
 if (er==false)
    return false; 
  if (obj.value < val)
			{
			 alert(Nam + "value should not be less then" + val);
			 return false;
			}    
 er=check_special_numeric(obj,Nam);
 if (er==false)
    return false;			
 var str =Trim(obj.value);
if (str.length > val) 
		  { 
		   alert(Nam + " length should be  " + val + "Digit");
		   return false;
		  }  
}

/*===================================================
   FUNCTION CHECKS FOR VALIDITY OF ACCOUNT NUMBER
===================================================*/

function chkacc(obj,val,nam)
{
var str=Trim(obj.value);
if (str.length == val)
  {
   var st,i,flag=1;
   for (i=0;i<3;i++)
   {
   st=str.substr(i,1);
   if ((st >= 'A' && st <= 'Z') || (st >= 'a' && st <= 'z')) 
    {
     flag=1;
    }
    else
    {
     flag=0;  
     break;
    }
    }
    if (flag==0)  
    { 
     alert("First 3 characters of " + nam + " should be Alphabets"); 
     return false;
    }
  }
  else
  {
   alert(nam + " length should be = " + val);
   return false;
  }
  var len;
  len=str.substr(3,5);
 
  if (isNaN(len))
  {
    alert("Last 5 characters of " + nam + " should be digits");
      return false;
  } 
}

/*===================================================
FUNCTION CHECKS FOR VALIDITY OF NUMERIC OR NOT
===================================================*/

function chkNmeric(obj,Nam)
{
if( isNaN(obj.value))
		  { 
		   alert(Nam + " is not Numeric");
		   return false;
		  }  
}
/*==========================================================
FUNCTION FOR EMAIL VALIDATION
==========================================================*/
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					
	}

function emailCheck(emailStr) {
		var sw = true;
		var checkTLD=0;
		var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
		var emailPat=/^(.+)@(.+)$/;
		var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
		var validChars="\[^\\s" + specialChars + "\]";
		var quotedUser="(\"[^\"]*\")";
		var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
		var atom=validChars + '+';
		var word="(" + atom + "|" + quotedUser + ")";
		var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
		var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
		var matchArray=emailStr.match(emailPat);
		
		if (matchArray==null)
		 {
			sw = false; return sw; 
		}
		var user=matchArray[1];
		var domain=matchArray[2];
		for (i=0; i<user.length; i++) {
			if (user.charCodeAt(i)>127) {
				sw = false;
			}
		}

		for (i=0; i<domain.length; i++) {
			if (domain.charCodeAt(i)>127) {
				sw = false;
			}
		}

		if (user.match(userPat)==null) {
			sw = false;
		}

		var IPArray=domain.match(ipDomainPat);
		if (IPArray!=null) {
			for (var i=1;i<=4;i++) {
   			if (IPArray[i]>255) {
					sw = false;
				}
			}
			return true;
		}

		var atomPat=new RegExp("^" + atom + "$");
		var domArr=domain.split(".");
		var len=domArr.length;
		for (i=0;i<len;i++) {
			if (domArr[i].search(atomPat)==-1) {
				sw = false;
			}
		}

		if (checkTLD && domArr[domArr.length-1].length!=2 &&	domArr[domArr.length-1].search(knownDomsPat)==-1) {
			sw = false;
		}
			   
		if (len<2) {
			sw = false;
		}
		return sw;
	}