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Javascript Email Validation function

Article by:  Jeff Anderson  ( 1362 ) (2/26/2002)
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Summary: A javascript validation function to check whether the user has entered a valid email address in a form.
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There are many varieties of email validation. This one is simple, but effective. It checks for a period (.) character anywhere after the 3rd character in the string (this is very cautious, allowing for one letter domain names e.g. a@b.com; and for @ characters anywhere after the first character (more possible, as a single letter username is easily possible)

If both of these exist, the function returns true, otherwise it returns false.




function isValidEmail(str) {

   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);

}

To understand how to use the IsValidEmail function to validate a form, see Form Validation function Page.






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