forms - Jquery Chosen focus on page load (onLoad?)

Question

I'm using the Jquery Chosen plugin on a select box, however I'd like to focus this on page load. I've used the following code to focus a text input:

onLoad="document.forms.sales_order_form.customer.focus()"

But this doesn't work for the select box:

<select data-placeholder="Select a Customer..." class="chzn-select" name="customer" style="width:400px;">
    <option value=""></option>
</select>

Answer 1

In Chosen 1.0, this command is now:

$('.my_select_box').trigger('chosen:activate');

See here.