regex in textfield

Question

dear all..i have this code:

<script>
var str="KD-R435MUN2D";
var matches=str.match(/(EE|[EJU]).*(D)/i);
if (matches) {
     var firstletter = matches [1];
     var secondletter = matches [2];
     var thirdletter = matches [3];
alert(firstletter + secondletter + thirdletter);
}else{
      alert (":(");
}
</script>

i want it can control a textfield <input type="text" id="mod">..how must i do?

Answer 1

You can add event listener to textfield and call the function when the event is fired. You can get text using document.getElementById('mod').value

Answer 2

<script type="text/javascript">
$("#mod").val();
var matches=str.match(/(EE|[EJU]).*(D)/i);
if (matches) {
     var firstletter = matches [1];
     var secondletter = matches [2];
     var thirdletter = matches [3];
alert(firstletter + secondletter + thirdletter);
}else{
      alert (":(");
}
</script>

Answer 3

Just do:

HTML:

<input id="mod" onchange="checkRegexp" />

JS:

function checkRegexp()
      {
      d = document.getElementById("mod");

      val = d.value;

      // Do the regexp on value
      }