$(document).ready(function(){
 
  // Sort the user list in "Survey permissions"
  if($('#uidselect').length > 0) {
    var userList = $('#uidselect');
 
    var userOptions = $('option', userList);
    var selectedOption = $(userList).val();
 
    // Case insensitive sort
    // Options sorted by string split at the first space
    /*
    userOptions.sort(function(a,b) {
      if (a.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1").toLowerCase() > b.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1").toLowerCase()) return 1;
      if (a.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1").toLowerCase() < b.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1").toLowerCase()) return -1;
      return 0
    });
    */
 
    // Case sensitive sort
    // Options sorted by string split at the first space   
    userOptions.sort(function(a,b) {
      if (a.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1") > b.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1")) return 1;
      if (a.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1") < b.text.replace(/^([^\s]+)\s(.+)$/,"$2 $1")) return -1;
      return 0
    });
 
    $(userList).empty().append(userOptions);
    $(userList).prepend($('option[value="-1"]', userList));
    $(userList).val(selectedOption);
  }  
});