function LTrim( value ) {
	var re = /\s*((\S+\s*)*)/;
	return value.replace(re, "$1");
}
function RTrim( value ) {
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1");
}
function trim( value ) {
	return LTrim(RTrim(value));
}
function confirmEmail(email,confirmemail){
	if(trim(email) == trim(confirmemail)){
		return true;
	}
	else{
		return false;
	}
}

function validateEmail(addr) {
 	var db=true;
	addr = trim(addr);
	if(addr == "" && addr == null){
		if (db) alert('email address is mandatory');
		   return false;
	}
	
	var invalidChars = '\/\'\\ ";:?!()[]\{\}^|#$%&`~*+<>,= ';
	for (i=0; i<invalidChars.length; i++) {
	   if (addr.indexOf(invalidChars.charAt(i),0) > -1) {
		  if (db) alert('email address contains invalid characters');
		  return false;
	   }
	}
	for (i=0; i<addr.length; i++) {
	   if (addr.charCodeAt(i)>127) {
		  if (db) alert("email address contains non ascii characters.");
		  return false;
	   }
	}
	if(!(addr.charCodeAt(0)>=65 && addr.charCodeAt(0)<=90)&& !(addr.charCodeAt(0)>=97 && addr.charCodeAt(0)<=122)){
	  if (db) alert('email address must start with Charecter');
	   return false;
	}
	if(addr.indexOf('.',0) == 0){
	  if (db) alert('email address must not start with .');
	   return false;
	}
	var atPos = addr.indexOf('@',0);
	if (atPos == -1) {
	   if (db) alert('email address must contain an @');
	   return false;
	}
	if (atPos == 0) {
	   if (db) alert('email address must not start with @');
	   return false;
	}
	if (addr.indexOf('@', atPos + 1) > - 1) {
	   if (db) alert('email address must contain only one @');
	   return false;
	}
	if (addr.indexOf('.', atPos) == -1) {
	   if (db) alert('email address must contain a period in the domain name');
	   return false;
	}
	var suffix = addr.substring(addr.lastIndexOf('.')+1);
	if (suffix.length != 2 && suffix != 'com' && suffix != 'net' && suffix != 'org' && suffix != 'edu' && suffix != 'int' && suffix != 'mil' && suffix != 'gov' & suffix != 'arpa' && suffix != 'biz' && suffix != 'aero' && suffix != 'name' && suffix != 'coop' && suffix != 'info' && suffix != 'pro' && suffix != 'museum') {
	   if (db) alert('invalid primary domain in email address');
	   return false;
	}
	for(i=0;i<addr.length;i++){
		if(!isChar(addr.charAt(i)) && isNaN(addr.charAt(i)) ){
 			if(!isChar(addr.charAt(i+1)) && isNaN(addr.charAt(i+1)) ){
			   if (db) alert('email address does not contain two Symbols continuously');
			   return false;
			}
			if(!isChar(addr.charAt(i-1)) && isNaN(addr.charAt(i-1)) ){
			   if (db) alert('email address does not contain two Symbols continuously');
			   return false;
			}
 		}
	}
	 return true;
}
function isChar(val){
 	if( (val.charCodeAt(0)>=65 && val.charCodeAt(0)<=90) || (val.charCodeAt(0)>=97 && val.charCodeAt(0)<=122) )	{
		return true;
	}
	else{
 		return false;
	}
}