jQuery - Disabling or Removing Options from a Menu -

i working on menu , want options within mutually exclusive. example, if select low importance, high importance should not option, , if select low urgency high urgency should not option either. how can achieve using jquery?

 <label>select priority level of task:&nbsp;</label>  <select id="taskpriority" name="priority[]" multiple="multiple">       <option value="lowimp">low importance</option>       <option value="highimp">high importance</option>       <option value="lowurg">low urgency</option>       <option value="highurg">high urgency</option>  </select> 

i've made checks when selection changes: http://jsfiddle.net/ckybj/1/

this th ugliest code i've written, works. can make lot more compact though.

$(document).ready(function () {     $('#taskpriority').on('change', function () {         var theval = $(this).val();         console.log(theval);         if (jquery.inarray('lowimp',theval) > -1) {             $('#taskpriority').find('option[value=highimp]').prop('disabled', true);         }          if (jquery.inarray('highimp',theval) > -1) {             $('#taskpriority').find('option[value=lowimp]').prop('disabled', true);         }         if (jquery.inarray('lowurg',theval) > -1) {             $('#taskpriority').find('option[value=highurg]').prop('disabled', true);         }         if (jquery.inarray('highurg',theval) > -1) {             $('#taskpriority').find('option[value=lowurg]').prop('disabled', true);         }         if(jquery.inarray('lowimp',theval) == -1){               $('#taskpriority').find('option[value=highimp]').prop('disabled',false);         }         if(jquery.inarray('highimp',theval) == -1){               $('#taskpriority').find('option[value=lowimp]').prop('disabled',false);         }         if(jquery.inarray('lowurg',theval) == -1){               $('#taskpriority').find('option[value=highurg]').prop('disabled',false);         }         if(jquery.inarray('highurg',theval) == -1){               $('#taskpriority').find('option[value=lowurg]').prop('disabled',false);         }     }); });