if (typeof(Prototype) == "undefined") 
throw "onDOMready requires Prototype";
Object.extend(Event,{_domReady:function(){if(arguments.callee.done)
return;arguments.callee.done=true;if(this._timer)
clearInterval(this._timer);this._readyCallbacks.each(function(f){f()});this._readyCallbacks=null;},onDOMReady:function(f){if(!this._readyCallbacks){var domReady=this._domReady.bind(this);if(document.addEventListener)
document.addEventListener("DOMContentLoaded",domReady,false);if(/WebKit/i.test(navigator.userAgent)){this._timer=setInterval(function(){if(/loaded|complete/.test(document.readyState))
domReady();},10);}
Event.observe(window,'load',domReady);Event._readyCallbacks=[];}
Event._readyCallbacks.push(f);}});