change the name of ddlFrequency to ddlFrequencyFC or anything..just rename it.. see the difference.. Thanks

I think you can ask the sender "sender" who fired the and called the function. I just used it a couple of days ago. You could of just Googled it to get the anwser. string strID = ((System.Web.UI.Control) sender).ID; {EDIT] or you can use the .OnClientClick to issue some javascript to change the display state of the textbox from block to none. The javascript is fake, and just meant to give you an idea of how to use OnClientClick .OnClientClick = "var txtID = getElementByID('txtBox'); txtID.style.display = 'none'; return true;"

Thanks... Its working now...

Use ItemDataBound event of datalist. take a gridview inside Datalist, and bind it in ItemDataBound event method. http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.datalist.itemdatabound.aspx[^]

The ajax model popup extender has a habit of resetting back to hidden during postback. You have to modelPopup.show() the extender in your button function to keep it in block mode, to keep it visible.

Add: else { return null; } before last '}'.