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Checking an email address - Version 01

< html> <head> <title>Checking an email address - Version 01</title> <script type="text/javascript" language="javascript"> <!-- // function IsMatchingAddress(str){     var myRegExp = /[a-z0-9-]{1,30}@[a-z0-9-]{1,65}.[a-z]{3}/ ;     return myRegExp.test(str) } function TestGuess(){ var EmailAddr = "asdf@asdf.net".toLowerCase(); alert(IsMatchingAddress(EmailAddr)); } // --> </script> </head> <body> <h3>This page allows you to enter and check  an email address such as asdf@rntsoft.com.com</h3> <form> <button type="Button" onclick="TestGuess()"> Click here to enter email address</button> </form> </body> </html>