Help with a javascript regexp syntax problem please.

Hi all,

I found a regexp for validating email addresses that seems to be fairly complete and is a more practical implementation of RFC 2822 at the bottom of the page at [regular-expressions.info ].

I stuck it into the JavaScript function below. It works with the RegExp constructor using the literal string, as long as backslashes are escaped. I think it's working correctly since when testing it, it conforms to the allowed syntax discribed in the syntax section of [en.wikipedia.org ]. However, can't seem to get it to work at all using the special regex syntax "var myregex = /regex/;".

Can anyone tell me why it's not working at all using the regex syntax?

I have pasted the function below with the none working syntax commented out...

function checkEmail(field,alerttxt) {
var emailAddressRegex = new RegExp("^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+(?:[A-Z]{2}|aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel)$");
//var emailAddressRegex = /^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel)$/;

with(field){
if (value==null || value=='') {
alert(alertText);
return true;
}else{
if(!emailAddressRegex.test(value)) {
alert('A valid email address must be entered.');
return true;
}else{
return false;
}
}
}
}


<html>
<head>
</head>
<body>
<script>
function checkEmail(field,alerttxt) {
  var emailAddressRegex = new RegExp("^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+(?:[A-Z]{2}|aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel)$");
  var emailAddressRegexLiteral = /^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel)$/;
  var result1, result2;
  with (field) {
    if (value == null || value == '') {
      alert(alertText);
      return true;
    } else {
      result1 = emailAddressRegex.test(value);
      result2 = emailAddressRegexLiteral.test(value);
      alert("Results were:\n" + result1 + "\n" + result2);
    }
  }
} 
checkEmail({value:"fotiman@example.com"}, "");
checkEmail({value:"fotimanexamplecom"}, "");
</script>
</body>
</html>

Help with a javascript regexp syntax problem please.

nelsonm

Fotiman

nelsonm

nelsonm

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