Hi Heera,
Please have a look into the sample code snippet.
ASPX:
<
telerik:RadAjaxManager
ID
=
"RadAjaxManager1"
runat
=
"server"
>
<
AjaxSettings
>
<
telerik:AjaxSetting
AjaxControlID
=
"RadButton1"
>
<
UpdatedControls
>
<
telerik:AjaxUpdatedControl
ControlID
=
"RadComboBox1"
/>
</
UpdatedControls
>
</
telerik:AjaxSetting
>
</
AjaxSettings
>
</
telerik:RadAjaxManager
>
<
telerik:RadTextBox
ID
=
"RadTextBox1"
runat
=
"server"
>
</
telerik:RadTextBox
>
<
telerik:RadComboBox
ID
=
"RadComboBox1"
runat
=
"server"
EmptyMessage
=
"Select"
OnClientSelectedIndexChanged
=
"OnClientSelectedIndexChanged"
>
<
Items
>
<
telerik:RadComboBoxItem
Text
=
"Item1"
/>
<
telerik:RadComboBoxItem
Text
=
"Item2"
/>
</
Items
>
</
telerik:RadComboBox
>
<
telerik:RadButton
ID
=
"RadButton1"
runat
=
"server"
Text
=
"Click"
>
</
telerik:RadButton
>
JavaScript:
<script type=
"text/javascript"
>
function
OnClientSelectedIndexChanged(sender, args) {
var
textbox = $find(
"<%=RadTextBox1.ClientID %>"
);
textbox.disable();
}
</script>
Thanks,
Shinu.