RadComboBox Loop Issue - Client Side Programming - Changing SelectedValues

[Majid Darab]

hi dear telerik team :
my 2 radcomboboxes codes is like below :

<telerik:RadComboBox ID="RadcbCustomersEmail" runat="server" DataSourceID="sdsCustomers"
    DataTextField="Email" DataValueField="ID" EnableEmbeddedSkins="false" Skin="VistaByMe"
    ValidationGroup="A" Width="244px" CausesValidation="False"
    MaxHeight="150px" AppendDataBoundItems="True" OnClientSelectedIndexChanged="OnClientSelectedIndexChanged_RadcbCustomersEmail">
    <Items>
        <telerik:RadComboBoxItem runat="server" Text="plz choose..."
            Value="-1" />
    </Items>
</telerik:RadComboBox>


<telerik:RadComboBox ID="RadcbCustomersMobile" runat="server" DataSourceID="sdsCustomers"
    DataTextField="Mobile" DataValueField="ID" EnableEmbeddedSkins="false" Skin="VistaByMe"
    ValidationGroup="A" Width="244px" CausesValidation="False"
    MaxHeight="150px" AppendDataBoundItems="True" OnClientSelectedIndexChanged="OnClientSelectedIndexChanged_RadcbCustomersMobile">
    <Items>
        <telerik:RadComboBoxItem runat="server" Text="plz choose..."
            Value="-1" />
    </Items>
</telerik:RadComboBox>

and javascript codes :

 

function OnClientSelectedIndexChanged_RadcbCustomersEmail(sender, eventArgs) {
    var MobileCombo = $find("<%= RadcbCustomersMobile.ClientID %>");
    var ComboItem = MobileCombo.findItemByValue(sender.get_selectedItem().get_value());
    MobileCombo.trackChanges();
    if (ComboItem != null)
        ComboItem.select();
    MobileCombo.commitChanges();
}

function OnClientSelectedIndexChanged_RadcbCustomersMobile(sender, eventArgs) {
    var EmailCombo = $find("<%= RadcbCustomersEmail.ClientID %>");
    var ComboItem = EmailCombo.findItemByValue(sender.get_selectedItem().get_value());
    EmailCombo.trackChanges();
    if (ComboItem != null)
        ComboItem.select();
    EmailCombo.commitChanges();
}

my syntax is ok , but i have a logical error about these codes / it seems there is a loop here / how can i prevent this loop?

thanks in advance
best regards