function AttachEvent(obj,evt,fnc,useCapture){if(!useCapture)useCapture=false;if(obj.addEventListener){obj.addEventListener(evt,fnc,useCapture);return true;}else if(obj.attachEvent)return obj.attachEvent("on"+evt,fnc);else{MyAttachEvent(obj,evt,fnc);obj['on'+evt]=function(){MyFireEvent(obj,evt)};}}
function MyAttachEvent(obj,evt,fnc){if(!obj.myEvents)obj.myEvents={};if(!obj.myEvents[evt])obj.myEvents[evt]=[];var evts=obj.myEvents[evt];evts[evts.length]=fnc;}
function MyFireEvent(obj,evt){if(!obj||!obj.myEvents||!obj.myEvents[evt])return;var evts=obj.myEvents[evt];for(var i=0,len=evts.length;i<len;i++)evts[i]();}