通过enent取得触发事件的ID属性

给你个函数:function getEventTarget(event){
    var targetEle=null;
    if(typeof event.target !="undefined"){
          targetEle=event.target;
    }else{
          targetEle=event.srcElement;
    }
    while(targetEle.nodeType==3 && targetEle.parentNode !=null){
          targetEle=targetEle.parentNode;
    }
    return targetEle;
}