How do I use javascript to force an UpDatePanel to Update

Hi, I am trying to find a simple way to force a specific update panel to refresh/update from a javascript function. The reason being that I am trying to build a simple calendar control, simular to that on the AJAX Control Toolbox site under PopUpControlhttp://atlas.asp.net/atlastoolkit/PopupControl/PopupControl.aspx, and I want the calendar to update if a date has been manually entered into the text box. I have found that you have to add an atrribute to the date input text box to invoke a call to a javascript function. (I am using the calendar control that I make inside of a gridview control which is enbeded inside of multiple levels of Update Panels and the TextBox.OnChange() event does not fire when inside of a gridview. So I added the following to the Page_Load event:TextBox.Attributes.Add("OnMouseLeave","javascriptFunction()") ) The problem that I am having is what to add to thejavascriptFunction()to force a specific UpDatePanel to refresh. I can get all of the panels to update using a "__doPostBack('DateControl$DateDisplay',''); "but there seems like that should be a simple way to force only one panel to update. I've tried to click on a hidden button using a javascript click() event, but I continuosly get the follwing javascript error: " Microsoft JScript runtime error: '_postbackSettings.async' is null or not an object " Is there a way to implement theUpdatePanel.Update() function directly from Javascript? Am I even going in the right direction? Could I call one of my code behind functions from javascript to perform the UpdatePanel.Update()?

So in simple terms, when building a control how can i update a specific UpdatePanel in the control through a javascript function?

Help Please!! Thanks!

There is no direct support for updating just a single panel. You can mostly achieve it by setting all your panels to be Conditional and then calling Update on just the ones you want.

Thanks,

Eilon