JavaScript/REGEX: Validate email addresses separated by commas

I use this JavaScript code to validate an email address:
var e = 'email@example.com';
if(/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/.test(e) == false) alert('Fail');

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How can I test to see if any email addresses, separated by commas, are invalid?

For example, this should pass:
test@example.com, xyy@example.com, hello@example.com

But this should fail:
test@example.com, xyy, hello@example.com
LVL 10
skijAsked:
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Russ SuterCommented:
Quickest thing I can think of is to just split the string and test each string part against the Regex

var e = 'test@example.com, xyy@example.com, hello@example.com'
var addresses = e.split(',')
for (var i = 0; i < addresses.length; ++i)
{
  if(/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/.test(addresses[i].trim()) == false)
  {
    alert('Fail');
    break;
  }
}

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Notice I did use the String trim() method to ensure leading and trailing whitespace is ignored from each array item.
0
hieloCommented:
Try:
if(/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})(,([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4}))*?$/g.test(e) == false)
	alert('Fail');

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0

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