// JavaScript Document

// EMAIL VALIDATION FUNCTION--1
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){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
}

function stripSpaces(x) {
    while (x.substring(0,1) == ' ') x = x.substring(1);
    return x;
}

function empty(x){ 
	if (x.length > 0) return false; else return true; 
}



// EMAIL VALIDATION FUNCTION--2
function emailCheck (emailStr) { 

	if(emailStr == "") 
	{ 
		alert ( "Please fill in the Email Address." ); 
		return false; 
	} 
	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) { 
		alert("The Email Address Is Invalid"); 
		return false; 
	} 
	var user=matchArray[1]; 
	var domain=matchArray[2]; 
	for (i=0; i<user.length; i++) { 
		if (user.charCodeAt(i)>127) { 
			alert("The Username in the email Contains Invalid Characters."); 
			return false; 
		} 
	} 
	for (i=0; i<domain.length; i++) { 
		if (domain.charCodeAt(i)>127) { 
			alert("Ths Domain Name in the email Contains Invalid Characters."); 
			return false; 
		} 
	} 
	if (user.match(userPat)==null) { 
		alert("The Username in the email Is Invalid."); 
		return false; 
	} 
	var IPArray=domain.match(ipDomainPat); 
	if (IPArray!=null) { 
		for (var i=1;i<=4;i++) { 
			if (IPArray[i]>255) { 
				alert("The Destination IP Address in the email Is Invalid."); 
				return false; 
			} 
		} 
		return true; 
	} 

	var atomPat=new RegExp("^" + atom + "$"); 
	var domArr=domain.split("."); 
	var len=domArr.length; 

	if (len<2) { 
		alert("The Address in the email Is Missing A Hostname."); 
		return false; 
	} 
	return true;
} 


// EMAIL VALIDATION FUNCTION--3
function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}