Javascript function to toggle an element based on other elements property

toggle_element.js

//author: Ismael Stahelin
//date: 25.3.2013
//the toggle function
//is based on selected option of a select element. if selected option has the desired property with the desired value
//so another element, in this case a checkbox element is shown, otherwise it is hidden
var toggleTemperature = function(){
  var op = $('#tracking_module_tracking_module_model_id option:selected');
  if($(op).attr('data-has_temperature_sensor') == 'true'){
    $('#temperature_control').show("fast");
  }else{
    $('#temperature_control').hide('fast');
    $('#use_temperature_sensor').prop('checked', false);
  }
};

//call to handle the toggle of element on page load
toggleTemperature();

//register the toggle function to be called when a change occurs on the select element
$('#tracking_module_tracking_module_model_id').change(function(){
  toggleTemperature();
});