How can we access a control outside the update panel with an control inside the update pan

Take a very simple example, i have a button inside the update panel along with other controls and i have a textbox on the page.What i want is that when i click the button inside the update panel,it should update the textbox which is present outside the update panel.How can i do this?

To my knowledge you cannot update any control outside of the update panel. If you want to update the control move it inside the update panel.

Do you want to modify the text box with server-side code? If so, put it in its own UpdatePanel. Set the UpdateMode on the panel to Conditional. Then you can either add the button in the other UpdatePanel as an AsyncPostBackTrigger to the new UpdatePanel or invoke the Update method on the new UpdatePanel in your button's Click event handler.

If you want to modify the text box on the client, you're going to have to write JavaScript.

Can you please tell me what javascript should i write for the sition i mentioned in the above example.

I am not getting the idea using javascript for a control inside the update panel.

Are you sure you need to write JavaScript? I gave you the steps to modify the text box using purely server-side code by using a second UpdatePanel control. I highly recommend you read theUpdatePanel tutorials and then re-read what I suggested. This path doesn't require JavaScript, but does require a round-trip to the server which is where your code will be executing.

If you do need to use JavaScript, you're going to need to handle the button's click event, modify the other control, and then prevent the default action for clicking the button from occurring (if necessary). This would all be done on the client so wouldn't require a round-trip to the server, but involves learning JavaScript and the DOM API (which you should want to learn as a web developer, anyways).

i have read it but still i feel i need javascript.Can u help me?