Callback & Masterpage

[sbao004]

Hi, I'm trying to use callback function to send a randon number to the client. My code works on a normal page, but not on a page with Masterpage. My JavaScript is: //To call the function in the Server function GetNumber() { UseCallBack(); } // To retrive the value from the server to display it in the TextBox1 function GetRandomNumberFromServer(arg, context) { document.cforms[0].TextBox1.value = arg; } So is there anything I should change? Thanks, Si Jia

[minhpc_bk]

What do you mean by it's not working on the web page using MasterPage? Is that the problem of accessing the textbox element? If so, you may need to view source the web page to have an idea about the id of the textbox at the client side.

[sbao004]

Cool. Thank you so much After I View the source code during the runtime, I find the ID of the textbox. The ID of the textbox is "ctl00$ContentPlaceHolder1$TextBox1" The name of the textbox is just TextBox1 and the "ct100" I don't know what it means but it's just there. Just in case someone has the same problem with me. Cheers,

[minhpc_bk]

The ctl00 is the ID of the master page instance at runtime, you can set the Trace="true" in the Page directive, browse the web page and look at the control tree section that may give you some information.