jquery - Hot to re-active preventDefault function in javascript -


when user clicked on submit button, need check validations before submition. if entered data not valid page should not submit. 

$(document).ready(function() {    $("#colomnchange").submit(function(e) {      var testa = 1;      if (testa == 1) {        testa = 2;        //e.preventdefault();        return false;      } else {        return true;      }      });  });

i can stop submition using priventdefault function in js. again user clicked on submit button after correct wrong data, page should submit well. how can re-active default function.

the answer is: go first if (because set variable 1 check if equals 1, true) change testa = 1 testa = 2 , event go else not have preventdefault() method event carry on


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