Jay opde

//Document ready function (Vanilla

(function(funcName, baseObj) {

    // The public function name defaults to window.docReady

    // but you can pass in your own object and own function name and those will be used

    // if you want to put them in a different namespace

    funcName = funcName || docReady;

    baseObj = baseObj || window;

    var readyList = [];

    var readyFired = false;

    var readyEventHandlersInstalled = false;

    // call this when the document is ready

    // this function protects itself against being called more than once

    function ready() {

        if (!readyFired) {

            // this must be set to true before we start calling callbacks

            readyFired = true;

            for (var i = 0; i < readyList.length; i++) {

                // if a callback here happens to add new ready handlers,

                // the docReady() function will see that it already fired

                // and will schedule the callback to run right after

                // this event loop finishes so all handlers will still execute

                // in order and no new ones will be added to the readyList

                // while we are processing the list

                readyList[i].fn.call(window, readyList[i].ctx);

            }

            // allow any closures held by these functions to free

            readyList = [];

        }

    }

    function readyStateChange() {

        if ( document.readyState === complete ) {

            ready();

        }

    }

    // This is the one public interface

    // docReady(fn, context);

    // the context argument is optional - if present, it will be passed

    // as an argument to the callback

    baseObj[funcName] = function(callback, context) {

        if (typeof callback !== function) {

            throw new TypeError(callback for docReady(fn) must be a function);

        }

        // if ready has already fired, then just schedule the callback

        // to fire asynchronously, but right away

        if (readyFired) {

            setTimeout(function() {callback(context);}, 1);

            return;

        } else {

            // add the function and context to the list

            readyList.push({fn: callback, ctx: context});

        }

        // if document already ready to go, schedule the ready function to run

        if (document.readyState === complete) {

            setTimeout(ready, 1);

        } else if (!readyEventHandlersInstalled) {

            // otherwise if we don't have event handlers installed, install them

            if (document.addEventListener) {

                // first choice is DOMContentLoaded event

                document.addEventListener(DOMContentLoaded, ready, false);

                // backup is window load event

                window.addEventListener(load, ready, false);

            } else {

                // must be IE

                document.attachEvent(onreadystatechange, readyStateChange);

                window.attachEvent(onload, ready);

            }

            readyEventHandlersInstalled = true;

        }

    }

})(docReady, window);