function isValidEmail(addr,man,db) {
if (addr == '' && man) {
   if (db) alert('Please enter a valid email address');
   return false;
}
if (addr == '') return true;
var invalidChars = '\/\'\\ ";:?!()[]\{\}^|';
for (i=0; i<invalidChars.length; i++) {
   if (addr.indexOf(invalidChars.charAt(i),0) > -1) {
      if (db) alert('Please enter a valid email address');
      return false;
   }
}
for (i=0; i<addr.length; i++) {
   if (addr.charCodeAt(i)>127) {
      if (db) alert("Please enter a valid email address.");
      return false;
   }
}

var atPos = addr.indexOf('@',0);
var atPos2 = addr.indexOf('.',0);
if (atPos2 == 0) {
   if (db) alert('Please enter a valid email address');
   return false;
}
if (atPos == -1) {
   if (db) alert('Please enter a valid email address');
   return false;
}

if (atPos == 0) {
   if (db) alert('Please enter a valid email address');
   return false;
}
if (addr.indexOf('@', atPos + 1) > - 1) {
   if (db) alert('Please enter a valid email address');
   return false;
}
if (addr.indexOf('.', atPos) == -1) {
   if (db) alert('Please enter a valid email address');
   return false;
}
if (addr.indexOf('@.',0) != -1) {
   if (db) alert('Please enter a valid email address');
   return false;
}
if (addr.indexOf('.@',0) != -1){
   if (db) alert('Please enter a valid email address');
   return false;
}
if (addr.indexOf('..',0) != -1) {
   if (db) alert('Please enter a valid email address');
   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('Please enter a valid email address');
   return false;
}
return true;
}

function validateEmail(addr,man,db,idfield) {
	
if (addr == '' && man) {
   if (db) 
   //alert('email address is mandatory');
   return false;
}
if (addr == '') return true;
var invalidChars = '\/\'\\ ";:?!()[]\{\}^|';
for (i=0; i<invalidChars.length; i++) {
   if (addr.indexOf(invalidChars.charAt(i),0) > -1) {
      if (db) 
	//  document.getElementById(idfield).innerHTML='email address contains invalid characters';
      return false;
   }
}
for (i=0; i<addr.length; i++) {
   if (addr.charCodeAt(i)>127) {
      if (db)
	 //document.getElementById(idfield).innerHTML="email address contains non ascii characters.";
      return false;
   }
}

var atPos = addr.indexOf('@',0);
var atPos2 = addr.indexOf('.',0);
if (atPos == -1) {
   if (db) 
    //document.getElementById(idfield).innerHTML="email address must contain an @";
   return false;
}
if (atPos2 == 0) {
   if (db) 
   //document.getElementById(idfield).innerHTML="email address must not start with a period";
   return false;
}
if (atPos == 0) {
   if (db) 
   //document.getElementById(idfield).innerHTML="email address must not start with @";
   return false;
}

if (addr.indexOf('@', atPos + 1) > - 1) {
   if (db)
    //document.getElementById(idfield).innerHTML='email address must contain only one @';
   return false;
}
if (addr.indexOf('.', atPos) == -1) {
   if (db)
   document.getElementById(idfield).innerHTML='email address must contain a period in the domain name';
   return false;
}
if (addr.indexOf('@.',0) != -1) {
   if (db)
    document.getElementById(idfield).innerHTML='period must not immediately follow @ in email address';
   return false;
}
if (addr.indexOf('.@',0) != -1){
   if (db) 
  // document.getElementById(idfield).innerHTML='period must not immediately precede @ in email address';
   return false;
}
if (addr.indexOf('..',0) != -1) {
   if (db)
    //document.getElementById(idfield).innerHTML='two periods must not be adjacent in email address';
   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)
    //document.getElementById(idfield).innerHTML='invalid primary domain in email address';
   return false;
}
return true;
}