function DSEvent(){this.events={};}
DSEvent.prototype.registerEvent=function(type){if(typeof this.events[type]!='undefined'){alert('Attempt to re-register event type: '+type);}else{this.events[type]=[];}};DSEvent.prototype.triggerEvent=function(type,evt,obj){if(typeof this.events[type]=='undefined'){alert('Unknown event: '+type);return false;}
if(typeof evt!='object'||evt==null){evt={};}
evt.eventType=type;for(var i=0;i<this.events[type].length;++i){if(this.events[type][i](evt,obj)==false){return false;}}
return true;};DSEvent.prototype.addListener=function(type,callback){if(typeof this.events[type]=='undefined'){alert('attempt to listen to unknown event type: '+type);}else{this.events[type].push(callback);}};DSEvent.prototype.bind=function(type,obj,func,arg){var f=function(e,o){func.call(obj,e,o,arg)};this.addListener(type,f);};DSEvent.prototype.removeListener=function(type,callback){if(this.events[type]){for(var i=0;i<this.events[type].length;++i){if(this.events[type][i]==callback){this.events[type].splice(i,1);break;}}}};DSEvent.prototype.getListeners=function(type){return this.events[type]||null;};function DSEventToken(e,t,f){this.elem=e;this.type=t;this.func=f;}
function DSBrowserEventObject(e,we,fa){this.event=e||we;this.el=fa.element;}
DSBrowserEventObject.prototype.preventDefault=function(){if(this.event.preventDefault!=null){this.event.preventDefault();}else if(this.event.returnValue!==null){this.event.returnValue=false;}};DSBrowserEventObject.prototype.getType=function(){return this.event.type;};DSBrowserEventObject.prototype.getKeyCode=function(){return this.event.keyCode;};DSBrowserEventObject.prototype.getCharCode=function(){return this.event.charCode;};DSBrowserEventObject.prototype.getCtrlKey=function(){return this.event.ctrlKey;};DSBrowserEventObject.prototype.getAltKey=function(){return this.event.altKey;};DSBrowserEventObject.prototype.getShiftKey=function(){return this.event.shiftKey;};DSBrowserEventObject.prototype.getMetaKey=function(){return this.event.metaKey;};DSBrowserEventObject.prototype.getMouseButton=function(){var b=this.event.button;if(DSBrowserEvent.isIE||DSBrowserEvent.isSafari){return(b>=4)?1:(b>=2)?2:0;}
return b;};DSBrowserEventObject.prototype.getPageX=function(){if(this.event.pageX){return this.event.pageX;}
if(DSBrowserEvent.isIE){if(document.documentElement&&document.documentElement.scrollTop>0){return this.event.clientX+document.documentElement.scrollTop;}else if(document.body!=null&&document.body.scrollTop>0){return this.event.clientX+document.body.scrollTop;}else{return this.event.clientX;}}else{return this.event.clientX;}};DSBrowserEventObject.prototype.getPageY=function(e){if(this.event.pageY){return this.event.pageY;}
if(DSBrowserEvent.isIE){if(document.documentElement&&document.documentElement.scrollTop>0){return this.event.clientY+document.documentElement.scrollTop;}else if(document.body!=null&&document.body.scrollTop>0){return this.event.clientY+document.body.scrollTop;}else{return this.event.clientY;}}else{return this.event.clientY;}};DSBrowserEventObject.prototype.preventDefault=function(){if(this.event.preventDefault!=null){this.event.preventDefault();}else if(this.event.returnValue!==null){this.event.returnValue=false;}};DSBrowserEventObject.prototype.stopPropagation=function(){if(this.event.stopPropagation!=null){this.event.stopPropagation();}else if(this.event.cancelBubble!==null){this.event.cancelBubble=true;}};DSBrowserEventObject.prototype.getTarget=function(){return this.event.target!=null?this.event.target:this.event.srcElement!=null?this.event.srcElement:null;};DSBrowserEventObject.prototype.getCurrentTarget=function(){return this.event.currentTarget!=null?this.event.currentTarget:this.el;};var DSBrowserEvent={};DSBrowserEvent.ua=navigator.userAgent.toLowerCase();DSBrowserEvent.isOpera=(DSBrowserEvent.ua.indexOf("opera")!=-1);DSBrowserEvent.isIE=(DSBrowserEvent.ua.indexOf('msie')!=-1&&!DSBrowserEvent.isOpera);DSBrowserEvent.isSafari=(DSBrowserEvent.ua.indexOf('safari')!=-1);DSBrowserEvent.addListener=function(el,t,f){if(el.addEventListener&&!(DSBrowserEvent.isSafari&&t=='dbclick')){el.addEventListener(t,f,false);}else{if(!el['on'+t]){el['on'+t]=function(e){if(t=='error')
if(!e)e=window.event;var fa=el[t+'Handlers'];for(var i=0;i<fa.length;++i){if(typeof fa[i]=='function'){fa[i](e);}}};el[t+'Handlers']=new Array();el[t+'Handlers'].element=el;}
el[t+'Handlers'].push(f);}
return new DSEventToken(el,t,f);};DSBrowserEvent.removeListener=function(el,t,f){if(el.removeEventListener&&!(DSBrowserEvent.isSafari&&t=='dbclick')){el.removeEventListener(t,f,false);}else{var fa=el[t+'Handlers'];for(var i=0;fa&&i<fa.length;++i){if(fa[i]==f){fa.splice(i,1);}}}};DSBrowserEvent.bind=function(elem,type,obj,func,arg){var f=function(evt){var e=new DSBrowserEventObject(evt,window.event,this);func.call(obj,e,arg)};return DSBrowserEvent.addListener(elem,type,f);};DSBrowserEvent.remove=function(tok){DSBrowserEvent.removeListener(tok.elem,tok.type,tok.func);};DSBrowserEvent.preventEvent=function(e,t){return DSBrowserEvent.addListener(e,t,DSBrowserEvent.killEvent);};DSBrowserEvent.killEvent=function(evt){var e=new DSBrowserEventObject(evt,window.event,this);e.stopPropagation();e.preventDefault();};