// JavaScript Document
function isValidCharEmail(strEmail) {
  var valid="123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_.@-";
//  validRegExp = /^[a-z]|(\.)|(\_)|(\-)$+[^@]+@[^@]/;
//  if (strEmail.search(validRegExp) == -1) {
    for (var i=0; i<strEmail.length; i++) {
        if (valid.indexOf(strEmail.charAt(i)) < 0) {
          return false;
        }
    }
	return true;
}
function isValidEmail(strEmail) {
//  if(strEmail=='') strEmail='**';
  validRegExp =/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\.int)|(\.arpa)|(\.biz)|(\.info)|(\..{2,2}))$)\b/gi;
  if(isValidCharEmail(strEmail)) {
    if (strEmail.search(validRegExp) == -1) 
    {
      return false;
    } 
  }
  else {
    return false;
  }
  return true; 
}