事件委托

    

      
1
      
9999999999999
      
3
      
4
      
5
      
6
      
7
      
8
    

window.onload = function(){
    var ul = document.getElementById("list");
    ul.onclick = function(eve){
        var event = eve || window.event;
        var target = event.target || event.srcElement;
        while(target.nodeName.toLowerCase() != 'li'){
            if(target === ul){
                target = null;
                break;
            }
            target = target.parentNode;
        }

        if(target){
            alert(target.innerHTML);
        }
    };
};