JavaScript Mailbox Validation Code Analysis

One of the simplest of this mailbox authentication does not verify mailbox length and legality, such as input "I'm @fdd." Hello, yes, you can.

The code is as follows	Copy Code
function Is_email (str) {if (Str.indexof ("@") ==-1) | | (Str.indexof (".") ==-1)) { return false; } return true; }

The above example simply determines if the user has entered a character that has @ and "." If not, then the email address is not valid, so if I enter

The code is as follows	Copy Code
Fdafafsfsafdsa@fsafdsa@.fafdafsa

This can also be verified by the following, we use validation to do a mailbox verification

The code is as follows

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function Test () {           var temp = document.getElementById ("Text1");           //Validation of e-mail             var myreg =/^ ([a-za-z0-9]+[_|_|.]?) *[a-za-z0-9]+@ ([a-za-z0-9]+[_|_|.]?) *[a-za-z0-9]+. [A-za-z] {2,3}$/;            if (!myreg.test (temp.value))      {                 alert (' Tip NN Please enter a valid e_mail! ');                Myreg.focus ();                 return false;     } }

It's a little bit stronger than the top, and he can pass.

The code is as follows	Copy Code
Fsafsa@fafa.fdsf

This can also be verified if we want to enter only as abc@qq.com

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var emailreg = "/^w+ (-w+) | (. w+)) *@[a-za-z0-9]+ ((. | -) [a-za-z0-9]+] *. [a-za-z0-9]+$/]; var ee = "xwz@126.com"; var rege = new RegExp (Emailreg);

This is probably OK, because there are too many domain names, so we do not need to limit the suffix.