This is jQuery Plugin using $.widget. slideDown animation is added to queue and it processes it sequentially.
Slide down animation speed. Same as second argument of jQuery.slideDown. default value is 200.
Waiting time until the following element is added. default value is 200
if this option is true, start state is wait. default is false. default value is false.
This event is triggered when slide down end.
This event is triggered when state change.
Now state. value is process or wait or stop.
process is processing queue.
wait is waiting added queue.
stop dosent process added queue.
Push item in Queue. Argument should be jQuery object.
Clear queue values.
Change state process or wait.
Change state to stop.