JavaScript Source Code 2002: Forms: Email Address Validation

Home

Email Address Validation

This is an e-mail address validation function. It allows the usual user@domain syntax, but in addition allows user@[ip] format as well as "User with Spaces"@domain or [ip], all of which are legal syntax, according to W3C. It also checks that the user hasn't done anything silly like having multiple @'s or continuous .'s in the address (e.g. jim@b@c.com and jim@c..b.co.uk).

JavaScript Source Code 2002: Forms: Email Address Validation
Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Apple-s). The script is yours!!!

  <HEAD> <SCRIPT LANGUAGE="Javascript">  /* 1.1.2: Fixed a bug where trailing . in e-mail address was passing (the bug is actually in the weak regexp engine of the browser; I simplified the regexps to make it work). 1.1.1: Removed restriction that countries must be preceded by a domain, so abc@host.uk is now legal. However, there's still the restriction that an address must end in a two or three letter word. 1.1: Rewrote most of the function to conform more closely to RFC 822. 1.0: Original */ <! > <! >  </script> </head>  <BODY> <center> <form name=emailform onSubmit="return emailCheck(this.email.value);"> Your Email Address: <input type=text name="email"><br> <input type=submit value="Submit"> </form> </center>