Hide selected options on from other select elements - html

Question

Given the following HTML:
<select name="question_order[]" id="data1">
<option value="">None</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select name="question_order[]" id="data2">
<option value="">None</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select name="question_order[]" id="data3">
<option value="">None</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
How can I hide/remove the selected options in data3, if it's already selected in data1 and data2?
For example, if I select 1 in data1, then 2 in data2, how can I remove those two option on data3?

Answer 1

Check the Js fiddle
http://jsfiddle.net/aZPdd/
$('#data1').on('change', function() {
var val=this.value;
$("#data3").find("option:contains("+val+")").remove();
});
$('#data2').on('change', function() {
var val=this.value;
$("#data3").find("option:contains("+val+")").remove();
});
$('#data3').on('change', function() {
});