I have java script code that searches the itunes appstore based off of the text entered into the autocomplete box. I want to manage all the autcomplete entries manually through javascript. My problem is that the asp.net runtime runs into a null object reference error when it tries to look for my data source. This may be because the json query to the appstore take a second or two so the entries to the the autocomplete box come in a little late. Is there any way around this error? Should I use a different telerik control? Thanks for the feedback.