JS Page Load Trigger

load_trigger.js

/*
 * Simple Page Load Trigger
 *
 * Copyright 2009 Wilker Lucio <wilkerlucio@gmail.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 */

SimpleLoadTrigger = (function() {
	var readyBound = false;
	var alreadyRun = false;
	var triggers = [];
	
	return {
		run: function() {
			if (alreadyRun) return;
			alreadyRun = true;
			
			for (var i = 0; i < triggers.length; i++) {
				triggers[i]();
			}
		},
		
		bind: function(callback) {
			this.bindReady();
			
			triggers.push(callback);
		},

		bindReady: function() {
			if (readyBound) return;
			readyBound = true;
			
			var self = this;
			var callback = function() {
				self.run();
			};
			
			if (document.addEventListener) {
				document.addEventListener("DOMContentLoaded", callback, false);
				
				window.addEventListener("load", callback, false);
			} else if (document.attachEvent) {
				document.attachEvent("onreadystatechange", function() {
					if (document.readyState === "complete") {
						document.detachEvent("onreadystatechange", arguments.callee, false);
						self.run();
					}
				});
				
				document.attachEvent("onload", callback);
			}
		}
	};
})();

on_ready = function(callback) {
	SimpleLoadTrigger.bind(callback);
};

load_trigger.min.js

/*
 * Simple Page Load Trigger
 *
 * Copyright 2009 Wilker Lucio <wilkerlucio@gmail.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 */

SimpleLoadTrigger=(function(){var readyBound=false;var alreadyRun=false;var triggers=[];return{run:function(){if(alreadyRun)return;alreadyRun=true;for(var i=0;i<triggers.length;i++){triggers[i]()}},bind:function(callback){this.bindReady();triggers.push(callback)},bindReady:function(){if(readyBound)return;readyBound=true;var self=this;var callback=function(){self.run()};if(document.addEventListener){document.addEventListener("DOMContentLoaded",callback,false);window.addEventListener("load",callback,false)}else if(document.attachEvent){document.attachEvent("onreadystatechange",function(){if(document.readyState==="complete"){document.detachEvent("onreadystatechange",arguments.callee,false);self.run()}});document.attachEvent("onload",callback)}}}})();on_ready=function(callback){SimpleLoadTrigger.bind(callback)};