jQuery( callback )

Binds a function to be executed when the DOM has finished loading.

Just like $(document).ready()

$(function(){

  // Document is ready

});

Example: Uses both the shortcut for $(document).ready() and the argument to write failsafe jQuery code using the $ alias, without relying on the global alias.

jQuery(function($) {

  // Your code using failsafe $ alias here...

});