I have a form where user need to select his top three langauges.
https://codepen.io/kaleem78/full/YjLGBN/
<table>
<tr><td>Top 1</td><td><select name='myselect'>
<option value='1'>java</option>
<option value='2'>javascript</option>
<option value='3'>actionscript</option>
<option value='4' disabled>photoshop</option>
<option value='5' >ajax</option>
</select></td></tr>
<tr><td>Top 2</td><td><select name='myselect2'>
<option value='1'>java</option>
<option value='2'>javascript</option>
<option value='3'>actionscript</option>
<option value='4' disabled>photoshop</option>
<option value='5' >ajax</option>
</select></td></tr>
<tr><td>Top 3</td><td><select name='myselect3'>
<option value='1'>java</option>
<option value='2'>javascript</option>
<option value='3'>actionscript</option>
<option value='4' disabled>photoshop</option>
<option value='5' >ajax</option>
</select></td></tr>
</table>
When user select his top 1 language, that language should not be shown in Top 2 and Top 3 options and when user selects his Top 2 language, then the Top 3 should not show Top 1 and Top 2 languages.
when user changes the Top 1 or Top 2 other should update accordingly.