I reviewed a small example by Mudassar for ajax autocomplete. We do like this version, and do not want to use the ajax control kit. We have a solution that will return very large lists of data when the autocomplete is used and are looking for a way to load sets of data depending on how the far scroll is used when the autocomplete list dropdown is shown. loading the whole result into the dropdown won't work as it will be too large. Any suggestions will be appreciated.