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The OnLoad client-side event handler is called when the input control is loaded on the client.

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:RadMaskedTextBox RenderMode="Lightweight" ID="RadMaskedTextBox1" runat="server">
    <ClientEvents OnLoad="Load" />
<script type="text/javascript">
    function Load(sender)
        sender.get_styles().EnabledStyle[0] += "background-color: lemonchiffon;";
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