<asp:textbox id="txtSearch" placeholder="Search Here for Symptoms or Health Conditions" xmlns:asp="#unknown">
runat="server" OnTextChanged="txtSearch_TextChanged"></asp:textbox>
<cc1:autocompleteextender id="AutoCompleteExtender1" runat="server" targetcontrolid="txtSearch" xmlns:cc1="#unknown">
MinimumPrefixLength="1" EnableCaching="true" CompletionInterval="100" ServiceMethod="GetSuggessions"
UseContextKey="true" CompletionSetCount="20">
</cc1:autocompleteextender>