var Handler={};if(document.addEventListener){Handler.add=function(element,eventType,handler){element.addEventListener(eventType,handler,false);};Handler.remove=function(element,eventType,handler){element.removeEventListener(eventType,handler,false);};}
else if(document.attachEvent){Handler.add=function(element,eventType,handler){if(Handler._find(element,eventType,handler)!=-1)return;var wrappedHandler=function(e){if(!e)e=window.event;var event={_event:e,type:e.type,target:e.srcElement,currentTarget:element,relatedTarget:e.fromElement?e.fromElement:e.toElement,eventPhase:(e.srcElement==element)?2:3,clientX:e.clientX,clientY:e.clientY,screenX:e.screenX,screenY:e.screenY,altKey:e.altKey,ctrlKey:e.ctrlKey,shiftKey:e.shiftKey,charCode:e.keyCode,stopPropagation:function(){this._event.cancelBubble=true;},preventDefault:function(){this._event.returnValue=false;}}
if(Function.prototype.call)
handler.call(element,event);else{element._currentHandler=handler;element._currentHandler(event);element._currentHandler=null;}};element.attachEvent("on"+eventType,wrappedHandler);var h={element:element,eventType:eventType,handler:handler,wrappedHandler:wrappedHandler};var d=element.document||element;var w=d.parentWindow;var id=Handler._uid();if(!w._allHandlers)w._allHandlers={};w._allHandlers[id]=h;if(!element._handlers)element._handlers=[];element._handlers.push(id);if(!w._onunloadHandlerRegistered){w._onunloadHandlerRegistered=true;w.attachEvent("onunload",Handler._removeAllHandlers);}};Handler.remove=function(element,eventType,handler){var i=Handler._find(element,eventType,handler);if(i==-1)return;var d=element.document||element;var w=d.parentWindow;var handlerId=element._handlers[i];var h=w._allHandlers[handlerId];element.detachEvent("on"+eventType,h.wrappedHandler);element._handlers.splice(i,1);delete w._allHandlers[handlerId];};Handler._find=function(element,eventType,handler){var handlers=element._handlers;if(!handlers)return-1;var d=element.document||element;var w=d.parentWindow;for(var i=handlers.length-1;i>=0;i--){var handlerId=handlers[i];var h=w._allHandlers[handlerId];if(h.eventType==eventType&&h.handler==handler)
return i;}
return-1;};Handler._removeAllHandlers=function(){var w=this;for(id in w._allHandlers){var h=w._allHandlers[id];h.element.detachEvent("on"+h.eventType,h.wrappedHandler);delete w._allHandlers[id];}}
Handler._counter=0;Handler._uid=function(){return"h"+Handler._counter++;};}