jQuery call function after load

$(window).bind("load", function() {

   // code here 
});

$(document).ready(my_function);

$(document).ready(function () {
  // Function code here.
});

Or the shorter but less readable variant:

$(my_function);

All of these will cause my_function to be called after the DOM loads.

See the ready event documentation for more details.

Binds a function to be executed whenever the DOM is ready to be traversed and manipulated.

Edit:

To simulate a click, use the click() method without arguments:

$('#button').click();

From the docs:

Triggers the click event of each matched element. Causes all of the functions that have been bound to that click event to be executed.

To put it all together, the following code simulates a click when the document finishes loading:

$(function () {
  $('#button').click();
});

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