function DSInit() {}

DSInit.initFunctions = new Array ();

DSInit.addFunction = function( func, pri ) {
    pri = pri || 50;
    var f = DSInit.initFunctions;
    if( typeof f != 'undefined' ) {
        var i = f.length - 1;
        while( i >= 0 && f[i][1] > pri ) --i;
        f.splice( i + 1, 0, [ func, pri ] );
    }
}
/*
 * Init function, called when page is done loading
 */
DSInit.Init = function() {
    // quit if this function has already been called
    if (arguments.callee.done) return;

    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;

    var err = null;

    DOM2Event.initRegistration();

    for( var i = 0; i < DSInit.initFunctions.length; ++i ) {
        try {
            // run each in a separate thread
            window.setTimeout( DSInit.initFunctions[i][0], 0 );
        } catch( e ) {
            if( ! err ) {
                err = e;
            }
        }
    }

    DSInit.initFunctions = null;  // clean up to free up some memory

    try {
        DSLink.addBehaviours();
    } catch( e ) {
        if( ! err ) {
            err = e;
        }
    }
    if( err ) {
        throw( err );
    }
}


/*
 * window.onload replacement
 * calls init function when the DOM tree is loaded and parsed
 */

// moz
if( document.addEventListener ) {
    document.addEventListener( "DOMContentLoaded", DSInit.Init, null );
}

// everyone else
window.onload = DSInit.Init;