RadButton's clicking is triggered when the following conditions are met: -input type="text" handles onkeypress event -onkeypress event focuses the RadButton -the key pressed that is handled by onkeypress event is Space or Enter Triggering the clicking with "Space" can be workaround by setting some timeout to the focus(). For example: ASPX: <telerik:RadButton ID="RadButton1" runat="server" Text="RadButton"></telerik:RadButton> <input type="text" name="name" value=" " onkeypress="KeyPressed();" /> JavaScript: function KeyPressed() { setTimeout(function () { $find("RadButton1").focus(); }, 200); }