javascript - How to trigger click on page load?

Question

I'm looking for a way to automatically "click" an item when the page loads.

I've tried using

$("document").ready(function() {
    $("ul.galleria li:first-child img").trigger('click');
});

but it doesn't seem to work? However, when I enter $("ul.galleria li:first-child img").trigger('click'); into Firebug's console and run the script, it works.

Can the trigger event be used on load?

Answer 1

The click handler that you are trying to trigger is most likely also attached via $(document).ready(). What is probably happening is that you are triggering the event before the handler is attached. The solution is to use setTimeout:

$("document").ready(function() {
    setTimeout(function() {
        $("ul.galleria li:first-child img").trigger('click');
    },10);
});

A delay of 10ms will cause the function to run immediately after all the $(document).ready() handlers have been called.

OR you check if the element is ready:

$("document").ready(function() {
  $("ul.galleria li:first-child img").ready(function() {
    $(this).click();
  });    
});