RadCombo Multi Selection Problem

[Ram]

Hi,
I am using following script for multi selection in radcombo

<telerik:RadComboBox ID="RadComboBox1" runat="server" EmptyMessage="Select Countries"
              AllowCustomText="true" MarkFirstMatch="true" HighlightTemplatedItems="true" Width="150px"
              OnClientDropDownClosed="onDropDownClosing">
              <ItemTemplate>
                  <div onclick="StopPropagation(event)" class="combo-item-template">
                <asp:CheckBox runat="server" ID="chk1" Text='<%# Eval("Country") %>' onclick="onToCheckBoxClick(this,'')"/>

                  </div>
              </ItemTemplate>
          </telerik:RadComboBox>

and javascript is as follows:

function onToCheckBoxClick(chk, temp) {

            var show = document.getElementById(temp);
            var combo = $find("<%= RadComboBox1.ClientID %>");

            cancelDropDownClosing = true;
            var text = "";
            var values = "";
            var items = combo.get_items();
            for (var i = 0; i < items.get_count(); i++) {
                var item = items.getItem(i);
                var chk1 = $get(combo.get_id() + "_i" + i + "_chk1");
                if (chk1.checked) {
                    text += item.get_text() + ";";
                    values += item.get_value() + ";";
                }
            }

            text = removeLastComma(text);
            values = removeLastComma(values);


        }

        var cancelDropDownClosing = false;

        function StopPropagation(e) {
            e.cancelBubble = true;
            if (e.stopPropagation) {
                e.stopPropagation();
            }
        }

        function onDropDownClosing() {
            cancelDropDownClosing = false;
        }
        function removeLastComma(str) {
            return str.replace(/;$/, "");
        }

From above code I am able to select multiple values but the selected values are not appearing drop down as a semicolon separated string.
what I am missing in the code can any one help?

Thanks,
Ram.

[Helen]

Hello Ram,

Probably you will find helpful the following code library project:

http://www.telerik.com/community/code-library/aspnet-ajax/combobox/radcombobox-advanced-multiple-selection.aspx

Also RadComboBox has built-in checkboxes support from Q2 2011.

Greetings,
Helen
the Telerik team