jQuery Forum

1. jQuery(function($){
       var array_2d = new Array();
       array_2d['value1'] = 1;
       array_2d['value2'] = 1;
       array_2d['value3'] = 1;
      
       $.each(array_2d, function(key, value){
           alert(key + ' ' + value);
       });
   });

1.  $(document).ready(function() {

2.            $('#faq').find('dd').hide().end().find('dt').click(function() {

3.                 $(this).next().slideToggle(); }); }); 

i have often noticed the use of event inside function() as in code below. could
someone tell me what is its use and what would happen if i do not use it?
 
 $(document).ready(function(){ $("a").click(function(event){ alert("Thanks for visiting!"); }); });