出现错误，却解决啊

}
for(var i=0;i<divLis.length;i++){
    divLis[i].onclick= function (event) {
        var event=event||window.event;
        var el=event.srcElement||event.target;
        switch(el.className){
            case 'close':
                removeDiv(el.parentNode.parentNode);
                break;
            case 'prise':
                priseBox(el.parentNode.parentNode.parentNode,el);
                break;
        }
    }
    var textArea=divLis[i].getElementsByClassName('conment')[0];

TypeError: divLis[i].getElementsByClassName is not a function

想了很久不知道为什么出错了