Bind Ready function based on jQuery 1.8.2 code.

bindReady.js

var bindReady = function (d) {

    function callback() {
        if (this.isReady) {
            return;
        }
        // Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
        if ( !document.body ) {
            return setTimeout( callback, 1 );
        }

        this.isReady = true;

        d();
    }

    var DOMContentLoaded = function() {
        if ( document.addEventListener ) {
            document.removeEventListener( "DOMContentLoaded", DOMContentLoaded, false );
            callback();
        } else if ( document.readyState === "complete" ) {
            // we're here because readyState === "complete" in oldIE
            // which is good enough for us to call the dom ready!
            document.detachEvent( "onreadystatechange", DOMContentLoaded );
            callback();
        }
    };

    if ( document.readyState === "complete" ) {
        // Handle it asynchronously to allow scripts the opportunity to delay ready
        setTimeout( callback, 1 );

    // Standards-based browsers support DOMContentLoaded
    } else if ( document.addEventListener ) {
        // Use the handy event callback
        document.addEventListener( "DOMContentLoaded", DOMContentLoaded, false );

        // A fallback to window.onload, that will always work
        window.addEventListener( "load", callback, false );

    // If IE event model is used
    } else {
        // Ensure firing before onload, maybe late but safe also for iframes
        document.attachEvent( "onreadystatechange", DOMContentLoaded );

        // A fallback to window.onload, that will always work
        window.attachEvent( "onload", callback );

        // If IE and not a frame
        // continually check to see if the document is ready
        var top = false;

        try {
            top = window.frameElement === null && document.documentElement;
        } catch(e) {}

        if ( top && top.doScroll ) {
            (function doScrollCheck() {
                if ( !this.isReady ) {

                    try {
                        // Use the trick by Diego Perini
                        // http://javascript.nwbox.com/IEContentLoaded/
                        top.doScroll("left");
                    } catch(e) {
                        return setTimeout( doScrollCheck, 50 );
                    }

                    // and execute any waiting functions
                    callback();
                }
            })();
        }
    }
};