var url = "${pageContext.request.contextPath}/group!findById.action?group.id="+idAll;
  window.showModalDialog(url,null,"dialogwidth:850px;dialogheight:550px; toolbar=no,top=200,left=200, menubar=no, location=no, status=no");  

  window.location.href = http://www.mamicode.com/"${pageContext.request.contextPath}/group!queryAll.action?pager.pageNumber=1";//关闭窗口刷新页面>     

Dialog模态窗口调用