javascript - validation script losing characters -


the script below should validate user input each typed character @ once, it's losing characters, , it's character after symbol (ex.: if type 14121982 date field, 14/_2/_9822 in textfield, , 14/_2/_982 internally). also, difference between content of textfield , content intenal variable issue.

jsfiddle

http://jsfiddle.net/klebermo/f8u4c/41/

code

var counter; var tam; var str; var regex;  $('.valida').each(function(){      $(this).on('focus', function(e){         regex = $(this).attr('pattern');          counter = 0;         tam = size_of(regex);         str = generate_string(regex, tam);          $(this).val(str);     });      $(this).on('keypress', function(e){         var tecla = e.which;         var tecla2 = string.fromcharcode(tecla);         var t = type_of(regex, counter);          if(typeof tecla == t) {             str = replaceat(str, counter, tecla2);             //counter++;         } else {             if(t != 'number' && t != 'string') {                 str = replaceat(str, counter, t);                 counter++;             }         }          counter++;          result = $("<div>");         result.append( "counter = "+counter+"<br>" );         result.append( "tecla2 = "+tecla2+"<br>" );         result.append( "typeof tecla2 = "+typeof tecla+"<br>" );         result.append( "typeof t = "+t+"<br>" );         result.append( "str = "+str+"<br>" );         $("#result").empty().append(result);          $(this).val(str);     });  });

anyone can see what's wrong here?

after more tryouts, working code:

jsfiddle

http://jsfiddle.net/klebermo/f8u4c/78/

code

$('.valida').each(function(){      $(this).on('focus', function(e){         regex = $(this).attr('pattern');          counter = 0;         tam = size_of(regex);         str = generate_string(regex, tam);          $(this).val(str);     });      $(this).on('keypress', function(e){         e.preventdefault();          var tecla = e.which;          if(tecla >= 48 && tecla <= 57)             var tecla2 = tecla - 48;         else             var tecla2 = string.fromcharcode(tecla);          result = $("<div>");         result.append( "tecla = "+tecla+"<br>" );          var t = type_of(regex, counter);          if(counter < tam) {             if(t != 'number' && t != 'string') {                 str = replaceat(str, counter, t);                 counter++;             }              t = type_of(regex, counter);              if(typeof tecla2 == t) {                 result.append( "tecla2 = "+tecla2+"<br>" );                 str = replaceat(str, counter, tecla2);                 counter++;             }         }          result.append( "counter = "+counter+"<br>" );         $("#result").empty().append(result);          $(this).val(str);     });  });

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