if ( typeof DOM == "undefined" ) {
    DOM = {};
}

DOM.Ready = {};

DOM.Ready.VERSION = "0.16";

DOM.Ready.finalTimeout = 15;
DOM.Ready.timerInterval = 50;

DOM.Ready._checkDOMReady = function () {
    if ( DOM.Ready._isReady ) {
        return DOM.Ready._isReady;
    }

    if (    typeof document.getElementsByTagName != "undefined"
         && typeof document.getElementById != "undefined"
         && ( document.getElementsByTagName("body")[0] !== null
              || document.body !== null ) ) {

        DOM.Ready._isReady = 1;
    }

    return DOM.Ready._isReady;

};

/* See near the end of the module for where _isDone could be set. */
DOM.Ready._checkDOMDone = function () {
    if ( DOM.Ready._isDone ) {
        return DOM.Ready._isDone;
    }

    /* Safari and Opera(?) only */

    /*@cc_on
       /*@if (@_win32)
    try {
        document.documentElement.doScroll("left");
        DOM.Ready._isDone = 1;
    } catch (e) {}
          @else @*/
    if ( document.readyState
         && ( /interactive|complete|loaded/.test( document.readyState ) )
       ) {
        DOM.Ready._isDone = 1;
    }
      /*@end
    @*/

    return DOM.Ready._isDone;
};

/* Works for Mozilla, and possibly nothing else */
if ( document.addEventListener ) {
    document.addEventListener(
        "DOMContentLoaded", function () { DOM.Ready._isDone = 1; }, false );
}

DOM.Ready.onDOMReady = function (callback) {
    if ( DOM.Ready._checkDOMReady() ) {
        callback();
    }
    else {
        DOM.Ready._onDOMReadyCallbacks.push(callback);
    }
};

DOM.Ready.onDOMDone = function (callback) {
    if ( DOM.Ready._checkDOMDone() ) {
        callback();
    }
    else {
        DOM.Ready._onDOMDoneCallbacks.push(callback);
    }
};

DOM.Ready.onIdReady = function ( id, callback ) {
    if ( DOM.Ready._checkDOMReady() ) {
        var elt = document.getElementById(id);
        if (elt) {
            callback(elt);
            return;
        }
    }

    var callback_array = DOM.Ready._onIdReadyCallbacks[id];
    if ( ! callback_array ) {
        callback_array = [];
    }
    callback_array.push(callback);

    DOM.Ready._onIdReadyCallbacks[id] = callback_array;
};

DOM.Ready._runDOMReadyCallbacks = function () {
    for ( var i = 0; i < DOM.Ready._onDOMReadyCallbacks.length; i++ ) {
        DOM.Ready._onDOMReadyCallbacks[i]();
    }

    DOM.Ready._onDOMReadyCallbacks = [];
};

DOM.Ready._runDOMDoneCallbacks = function () {
    for ( var i = 0; i < DOM.Ready._onDOMDoneCallbacks.length; i++ ) {
        DOM.Ready._onDOMDoneCallbacks[i]();
    }

    DOM.Ready._onDOMDoneCallbacks = [];
};

DOM.Ready._runIdCallbacks = function () {
    for ( var id in DOM.Ready._onIdReadyCallbacks ) {
        // protect against changes to Object (ala prototype's extend)
        if ( ! DOM.Ready._onIdReadyCallbacks.hasOwnProperty(id) ) {
            continue;
        }

        var elt = document.getElementById(id);

        if (elt) {
            for ( var i = 0; i < DOM.Ready._onIdReadyCallbacks[id].length; i++) {
                DOM.Ready._onIdReadyCallbacks[id][i](elt);
            }

            delete DOM.Ready._onIdReadyCallbacks[id];
        }
    }
};

DOM.Ready._runReadyCallbacks = function () {
    if ( DOM.Ready._inRunReadyCallbacks ) {
        return;
    }

    DOM.Ready._inRunReadyCallbacks = 1;

    if ( DOM.Ready._checkDOMReady() ) {
        DOM.Ready._runDOMReadyCallbacks();

        DOM.Ready._runIdCallbacks();
    }

    if ( DOM.Ready._checkDOMDone() ) {
        DOM.Ready._runDOMDoneCallbacks();
    }

    DOM.Ready._timePassed += DOM.Ready._lastTimerInterval;

    if ( ( DOM.Ready._timePassed / 1000 ) >= DOM.Ready.finalTimeout ) {
        DOM.Ready._stopTimer();
    }

    DOM.Ready._inRunReadyCallbacks = 0;
};

DOM.Ready._startTimer = function () {
    DOM.Ready._lastTimerInterval = DOM.Ready.timerInterval;
    DOM.Ready._intervalId = setInterval( DOM.Ready._runReadyCallbacks, DOM.Ready.timerInterval );
};

DOM.Ready._stopTimer = function () {
    clearInterval( DOM.Ready._intervalId );
    DOM.Ready._intervalId = null;
};

DOM.Ready._resetClass = function () {
    DOM.Ready._stopTimer();

    DOM.Ready._timePassed = 0;

    DOM.Ready._isReady = 0;
    DOM.Ready._isDone = 0;

    DOM.Ready._onDOMReadyCallbacks = [];
    DOM.Ready._onDOMDoneCallbacks = [];
    DOM.Ready._onIdReadyCallbacks = {};

    DOM.Ready._startTimer();
};

DOM.Ready._resetClass();

DOM.Ready.runCallbacks = function () { DOM.Ready._runReadyCallbacks(); };


/*

=head1 AUTHOR

Dave Rolsky, <autarch@urth.org>.

=head1 CREDITS

This library was inspired by Brother Cake's domFunction, though it
is entirely new code.

=head1 COPYRIGHT

Copyright (c) 2005-2006 Dave Rolsky.  All rights reserved.

This module is free software; you can redistribute it and/or modify it
under the same terms as the Perl programming language (your choice of
GPL or the Perl Artistic license).

*/