ライブラリ動的読み込み

widget-template.js

new function() {
	var callback = function() {
		// main code
	};


	// util
	var script = (function() {
		var s = document.getElementsByTagName('script');
		return s[s.length - 1];
	})();

	var swfobject, $; // libs' namespase
	new function() {
		var lib = [
			{
				src     : 'http://ajax.googleapis.com/ajax/libs/swfobject/2.1/swfobject.js',
				complete: (function() {
					var _swfobject = window.swfobject || undefined;
					return function() {
						swfobject = window.swfobject;
						window.swfobject = _swfobject;
					};
				})()
			},
			{
				src     : 'http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js',
				complete: function() {
					$ = window.jQuery.noConflict(true);

					// plugins
					// http://gist.github.com/14048
					$.fn.fl = function(o) {
						if (!o) {
							var id = this.attr('id');
							return $.browser.msie ? window[id] : document[id];
						}
						o = $.extend({
							version: '9.0.47',
							params : {
								wmode: 'transparent'
							}
						}, o);
						if (swfobject.hasFlashPlayerVersion(o.version)) {
							o.attrs = $.extend(o.attrs || {}, {
								data  : o.src,
								width : o.width,
								height: o.height
							});
							if (o.flashvars) o.params.flashvars = $.param(o.flashvars);
							var element = o.id ?
								$('<div id="'+o.id+'"/>').appendTo(this) :
								this;
							swfobject.createSWF(
								o.attrs,
								o.params,
								element.attr('id')
							);
						}
						return this;
					};
				}
			}
		];

		var load = function() {
			var f = arguments.callee;
			var l = lib.shift();
			if (!l || findScript(l.src) != -1) {
				callback();
				return;
			}

			if (l.beforeSend) beforeSend();

			var script = document.createElement('script');
			script.type    = 'text/javascript';
			script.src     = l.src;
			script.charset = 'UTF-8';
			var done = false;
			script.onload = script.onreadystatechange = function() {
				if (
					!done && (!this.readyState ||
					this.readyState == 'loaded' || this.readyState == 'complete')
				) {
					done = true;
					if (l.complete) l.complete();
					f();
				}
			};	
			document.body.appendChild(script);

			function findScript(src) {
				var s = document.getElementsByTagName('script');
				var i = s.length;
				while (i--) if (s[i].src == src) return i;
				return -1;
			}
		};

		window.attachEvent ? window.attachEvent('onload', load) : load();
	};
};