setTimeout in select box change event

Question

When I have autopostback set to true on a select box, why is the 'setTimeout' necessary in the onchange event? Why isn't __doPostBack just called directly?

onchange="javascript:setTimeout('__doPostBack(\'ctl00$myselect\',\'\')', 0)" 

Answer 1

From MSDN:

The JavaScript setTimeout method is used with the _doPostBack method to ensure that the user action completes before the postback occurs.