1 function addEvt(oTarget,sEvtType,fnHandle){
2 if(!oTarget){return;}
3 if(oTarget.addEventListener){
4 oTarget.addEventListener(sEvtType,fnHandle,false);
5 }else if(oTarget.attachEvent){
6 oTarget.attachEvent("on" + sEvtType,fnHandle);
7 }else{
8 oTarget["on" + sEvtType] = fnHandle;
9 }
10 }