JavaScript determines whether the user enters the mailbox and phone format correctly

JavaScript to determine whether the user entered the correct mailbox format, to determine the user entered the phone number format is correct, the following has a good example, interested friends can refer to the

The code is as follows: * * Function: To determine whether the user entered the mailbox format is correct * pass parameter: no * return value: TRUE or False/function Form_check () {var email = Document.getelementb Yid ("email"). Value; Get the mailbox address//Determine if the mailbox format is correct if (!/^w+ [-+.] w+) *@w+ ([-.] w+) *.w+ ([-.]  w+) *$/.test {alert ("Mailbox format Error!"); document.getElementById ("email"). focus ();  Let the mailbox text box get focus return false;  return true;   * * * Function: To determine whether the user entered the mobile phone number format is correct * pass parameter: no * return value: TRUE or False/function Checkmobile (s) {var regu =/^[1][0-9][0-9]{9}$/;  var re = new RegExp (Regu);  if (Re.test (s)) {return true;  else {return false; }  }