Webプラグインの開発概要

    loadModule: function(url, callback) {
        var script = d.createElement('script');
        script.setAttribute('src', url);
        script.setAttribute('charset', "utf-8");
        script.setAttribute('type','text/javascript');
        if (callback) {
            script.onload = callback;
            script.onreadystatechange = function() {
                if (this.readyState == 'complete' || this.readyState == 'loaded') {
                    callback();
                }
            };
        }
        d.getElementsByTagName("head")[0].appendChild(script);
    }

function onDocumentReady(callback){
		// Mozilla, Opera and webkit
        if (document.addEventListener) {
            document.addEventListener("DOMContentLoaded", function(){
                document.removeEventListener("DOMContentLoaded", arguments.callee, false);
                callback.call(this);
            }, false );
		// If IE event model is used
        } else if (document.attachEvent) {
        // ensure firing before onload,
        // maybe late but safe also for iframes
            document.attachEvent("onreadystatechange", function(){
                if ( document.readyState === "complete" ) {
                    document.detachEvent( "onreadystatechange", arguments.callee );
                    callback.call(this);
                }
            });
// If IE and not an iframe
        		// continually check to see if the document is ready
            if (document. documentElement.doScroll && window == window.top) (function(){
                if (isReady) return;
                try {
// http://javascript.nwbox.com/IEContentLoaded/
                    document. documentElement.doScroll("left");
                } catch( error ) {
                    setTimeout(arguments.callee, 0);
                    return;
                }
                callback.call(this);
            })();
        }
        window.onload = callback;
};