JS Regular expression verification of email address _javascript tips

The most common validation that we encounter is email address verification. Common on the site. Various web scripts are also commonly used in "regular expression" (regular expression) to verify the email address we entered, to determine whether it is legal. Some can also break out the user name and domain name. Now implement the email address validator in JavaScript language, using the regular expression library of the JavaScript language.

Effect Chart:

An illegal situation:

The legal situation:

The source code is as follows: The Web page has been validated by IE, Firefox, and Chrome.

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">  

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