Web Development Common JS authentication, using regular expression to verify the mailbox, mobile phone, ID card and other input

Regular-expression validation

// Email   var emailreg =/^ ([a-za-z0-9_\.\-]) +\@ (([a-za-z0-9\-]) +\.) + ([a-za-z0-9]{2,4}) +$/;    = document.getElementById ("email"). value;    if (! emailreg.test (email)) {       Win_alert (' The mailbox you entered is not in the correct format! ' );        return ;   }

　　

//Mobile phone number   varPhonereg =/^ ( -[0-9]{9})| ( the[0-9][0-9]{8})| ( -[0-9][0-9]{8})$/; if(!phonereg.test (phone)) {Win_alert ('phone input format is not correct!'); return; }

    // Identification Number Verification   Idcard = document.getElementById ("idcard"). value;    var idcardreg =/(^\d{}$) | (^\d{}$) | (^\d{} (\d| X|X) $)/;    if (! idcardreg.test (Idcard)) {       Win_alert (' ID card input is not legal!  ');        return ;   }

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Web Development Common JS authentication, using regular expressions to verify the mailbox, cell phone, ID and other input