OnLoad | RadTextBox for ASP.NET AJAX Documentation
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The OnLoad client-side event handler is called when the input control is loaded on the client.


The OnLoad event is supported by all RadInput controls.

Two parameters are passed to the event handler:

  • sender is the input control.

  • eventArgs is an instance of Sys.EventArgs.

The following example uses the OnLoad event to change the background color of a text box:

<telerik:RadTextBox RenderMode="Lightweight" ID="RadTextBox1" runat="server">
    <ClientEvents OnLoad="Load" />
<script type="text/javascript">
    function Load(sender)
        sender.get_styles().EnabledStyle[0] += "background-color: lemonchiffon;";
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