JavaScript checks whether the email address and mobile phone format entered by the user are correct

JavaScript checks whether the email address and mobile phone format entered by the user are correct

JavaScript checks whether the email format entered by the user is correct and whether the mobile phone number format entered by the user is correct. The following is a good example. If you are interested, refer

The Code is as follows:

/*

* Function: determines whether the email format entered by the user is correct.

* Parameter passing: None

* Return value: true or false

*/

Function form_check (){

Var email = document. getElementById ("email"). value; // get the email address

// Determine whether the email format is correct

If (! /^ W + ([-+.] w +) * @ w + ([-.] w + )*. w + ([-.] w +) * $ /. test (email )){

Alert ("Incorrect email format! ");

Document. getElementById ("email"). focus (); // get the focus of the mailbox text box

Return false;

}

Return true;

}

/*

* Function: determines whether the format of the mobile phone number entered by the user is correct.

* Parameter passing: None

* Return value: true or false

*/

Function checkMobile (s ){

Var regu =/^ [1] [0-9] [0-9] {9} $ /;

Var re = new RegExp (regu );

If (re. test (s )){

Return true;

} Else {

Return false;

}

}