EasyUI format 图片的问题

<th data-options="field:'img',width:120,align:'left',formatter:HongBai.formatPic">上传凭证</th>

//格式化多图片链接
    formatPic: function (val, row) {
      var pics=new Array()
        if (val) {
          pics=val.split(",");
          var html="<li style=\"list-style-type:none;float:left\">"
          for(i=0;i<pics.length;i++){
            html+= "<a href='" + pics[i] + "' target='_blank' style=\"text-decoration:none\">查看</a>";                     
            html+="</li>&nbsp"; 
          }
          return html;
        }
        return "";
    }