jquery - Form submit callback returning multiple times? And how to create a function for a null value in another function? -

sorry double question, i'm encountering few issues try crack password change form. follow on previous question here submitting form if 'if' statements return true.

i have keyup function runs through if/else statements check password conforms number of requirements. example, if longer 7 characters, if contains capital letter, if contains 2 numbers etc. have created global variable 'rtntrue = 1' set 0 on else statements inside keyup function (if fail 1 of requirements rtntrue = 0). theory if rtntrue = 1, form can submitted, otherwise can't.

i have 2 problems:

1. even variable global, still need set rule on submit action because rtntrue happen when user types in password input box. e.g. if press submit without typing anything, rtntrue = 1 anyway it'll submit. need along lines of pwd.length == 0 i'm not sure how because of variable being inside keyup function?
2. if type incorrect in box , click submit, callback alert showing 3 times , don't know why!

here's js code , i've created jsfiddle here because it's quite long!

var rtntrue = 1;  $('#password-info').hide();  $('#form-password-change #input-password').keyup(function() {      // keyup code here     // set password variable     var pwd = $(this).val();      // validate length     if (pwd.length > 7) {         $('#length').removeclass('invalid').addclass('valid');     } else {         $('#length').removeclass('valid').addclass('invalid');         rtntrue = 0;     }      // regexp     // validate letter     if ( /([^a-z]*[a-z]){3,}/i.test(pwd) ) {         $('#letter').removeclass('invalid').addclass('valid');     } else {         $('#letter').removeclass('valid').addclass('invalid');         rtntrue = 0;     }      // validate repeated letters (none repeated more twice)     if ( /([a-za-z])(.*?\1){2}/.test(pwd) ) {         $('#letter .repeated').removeclass('valid').addclass('invalid');         $('#letter').addclass('invalid-repeated');     } else {         $('#letter .repeated').removeclass('invalid').addclass('valid');         $('#letter').removeclass('invalid-repeated');         rtntrue = 0;     }      // validate capital letter     if (pwd.match(/[a-z]/)) {         $('#capital').removeclass('invalid').addclass('valid');     } else {         $('#capital').removeclass('valid').addclass('invalid');         rtntrue = 0;     }      // validate number     if ( /([^\d]*[\d]){2,}/.test(pwd) ) {         $('#number').removeclass('invalid').addclass('valid');     } else {         $('#number').removeclass('valid').addclass('invalid');         rtntrue = 0;     }      // validate repeated numbers (none repeated more twice)     if ( /([\d])(.*?\1){2}/.test(pwd) ) {         $('#number .repeated').removeclass('valid').addclass('invalid');         $('#number').addclass('invalid-repeated');     } else {         $('#number .repeated').removeclass('invalid').addclass('valid');         $('#number').removeclass('invalid-repeated');         rtntrue = 0;     }      passwordformsubmit(); // new function  }).focus(function() {     // focus code here     $('#password-info').slidedown('fast');  }).blur(function() {     // blur code here     $('#password-info').show(); });  function passwordformsubmit() {       var local = rtntrue;      if (rtntrue==1) {         $('#form-password-change').submit(function(){             return true;         });     }else {         $('#form-password-change').submit(function(){             alert(rtntrue);             return false;         });     } } 

if want quick ways achieve goal, modified jsfiddle. try using true / false instead of 0 or 1. , trying submit form every time user types. see did in jsfiddle.

and try setting first variable false, if user click submit button no input, not submit.

http://jsfiddle.net/zncqx/22/

var passwordfine = false;