Removing RadCalendar from the Tab Sequence | RadCalendar for ASP.NET AJAX Documentation
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Removing RadCalendar from the Tab Sequence

When browsing through a page with the Tab key, sometimes you want to skip the calendar from the controls gaining focus. Unfortunately setting its TabIndex=-1 will not accomplish this, as the tab index is not inherited by the child controls, which are html links (<a href> tags).

You can remove the calendar child controls from the tab sequence by writing a JavaScript function such as the following. Note that the function to set the tab index of child controls must be called both when the window loads, and by the client-side OnCalendarViewChanged event handler.

<script type="text/javascript">
    if (window.attachEvent) {
        window.attachEvent("onload", ClearAnchors);
    else {
       window.addEventListener("load", ClearAnchors, false);
    function ClearAnchors() {
        var calendarTable = $get("<%= RadCalendar1.ClientID %>");
        var anchors = calendarTable.getElementsByTagName("a");
        for (var i = 0; i < anchors.length; i++) {
            var anchor = anchors[i];
            anchor.tabIndex = -1;
    function OnCalendarViewChanged(calendar, eventArgs) {

If you are using RadDatePicker , RadDateTimePicker or RadTimePicker, a similar issue arises with the popup buttons, which are rendered as <a> tag. However, for these controls, the popup buttons are accessible through the DatePopupButton and TimePopupButton properties, so you can simply set the TabIndex property for the button in the designer.

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