Hi ashish,
Here is how to change the command's tooltip on the client:
<telerik:raddocklayout id="RadDockLayout1" runat="server">
<telerik:raddockzone id="RadDockZone1" runat="server" minheight="200" style="float: left;
margin-right: 20px;" width="300">
<telerik:raddock id="RadDock1" runat="server" title="RadDock1">
<commands>
<telerik:dockexpandcollapsecommand />
<telerik:dockcommand cssclass="MyCustomStyle" name="help"/> </commands>
</telerik:raddock>
</telerik:raddockzone>
</telerik:raddocklayout>
<input type="button" value="change text" onclick="changeCommandText()" />
<script type="text/javascript">
function changeCommandText()
{
var dock = $find("RadDock1");
dock.getCommand("help").get_element().title = "new"; }
</script>
Hope this helps.
Kind regards,
Petya
the Telerik team