how to make popup box based on dropdown list selection using jquery

I have three colu开发者_如何学Cmns in the jquery grid with all three column has dropdown list boxes.

if you select first dropdown list box any value i need to enable second one. if you select second I need to enable third one using jquery.

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one of the coolest things about jquery is its ability to handle events in the DOM.

the event you're looking for is .change() http://api.jquery.com/change/

the html markup for 2 select elements

<select id="first_select">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
</select>
<select id="second_select" disabled="disabled">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
</select>

javascript/jquery to handle changes to the select boxes

$("#first_select").change(function() {
  $("#second_select").removeAttr('disabled');
});

The second select element will be enabled when a change is made to the first. Follow this logic for the third select.