Editing JQuery JQueryMobile (section)

===API===
The '''$''' sign is special and important character. $() is used for element selection like:
 $(this).hide() - hides the current element.
 
 $("p").hide() - hides all p elements.
 
 $(".test").hide() - hides all elements with class="test", class names are prefixed with '''.'''
  
 $("#test").hide() - hides the element with id="test", id names are prefixed with '''#'''
 
 $("p:first") - selects the first p element

*getting attributes of elements: $('<element name>').attr('<attribute name>')
*setting attributes of elements: $('a').attr({<attribute name>: '<value>', <attribute name>: '<value>'});

====ajax()====
There are two version ajax(url,options) and ajax(options) ([http://api.jquery.com/jquery.ajax/ offical doc]), but in most cases the latter is used. Options is an array of key value pairs:

 $.ajax({
   url: url,
   dataType: 'json', // type of data that you're expecting back from the server
   data: data, // data to be sent to the server
   success: callback, // has 3 parameter: data returned from server of type 'dataType', status string, XMLHttpRequest
   error: function (jqXHR, textStatus, errorThrown) // errorThrown is the text equivalent for the return code
 });

returns a jQuery XMLHttpRequest (jqXHR) object.

====jQuery()====
*'''$()''' is short of jQuery()


====getJSON()====
 $.getJSON('car-sale-report.json', function() {
   //callback
 });
 
is equivalent to [[#ajax.28.29|ajax()]].