Autotab input with javascript -

i have 3 inputs need tab next when max length reached. these 3 inputs come values , when user change value of first input focus on next , on.

my problem since second input has length jumps third input. if use input values don't this.

the source of problem if typing fast first keyup event fired after second type , fires on second input.

i've written jsfiddle problem , function wire auto focus change.

 function wireautotab(currentelement, nextelement) {     currentelement.keyup(function (e) {         //retrieve key pressed.         var keyid = (window.event) ? event.keycode : e.keycode;         var fieldlength = currentelement.attr('maxlength');          //if user has filled textbox given length ,         //the user pressed number or letter, move         //cursor next element in tab sequence.            if (currentelement.val().length >= fieldlength && ((keyid >= 48 && keyid <= 90) || (keyid >= 96 && keyid <= 105)))             nextelement.focus();     }); } 

is there other event can use prevent this? behavior want if second input has value, stops on it.