Auto Complete Minimum number of characters for web service call

[Jim]

I have a combobox as displayed below, and I was wondering if there is a setting to control the minimum number of characters to display before the service gets called. In other words, I would like to call the service only after the user typed in 3 or more characters. Also, when the control initially loads, there are no rows, as soon as I start typing, a blank drop down appears. Is there a way to supress the display the dropdown if there are no rows?                                                 <script type="text/javascript">

function OnClientItemsRequesting(sender, eventArgs) {

var context = eventArgs.get_context();

context["prefixText"] = eventArgs.get_text();

}

</script>

<telerik:RadComboBox ID="rcCompany" runat="server"

AllowCustomText="true"

DataTextField="Name"

DataValueField="CompanyId"

Height="200px"

Width="400px"

DropDownWidth="400px"

MarkFirstMatch="true"

Text='<%# Bind("CompanyName") %>'

EnableLoadOnDemand="true"

ShowMoreResultsBox="true"

EnableVirtualScrolling="true"

OnClientItemsRequesting="OnClientItemsRequesting">

<WebServiceSettings Method="GetCompletionList"

Path="AutoCompleteCompany.asmx" />

</telerik:RadComboBox>

[Jim]

function OnClientItemsRequesting(sender, eventArgs)
       {
           var textvalue = sender._inputDomElement.value;

           if (textvalue.length < 3)
           {
                eventArgs.set_cancel(true);
           }
       }

OK, here is the answer to my own question.