onload不停的刷~

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
<script type="text/javascript">
function b(){
window.location.href="<%=request.getContextPath()%>/jxgl_login2.action";}
</script>
</head>
<body onload="b()">
欢迎光临
</body>
</html>页面放在frameset框架中，进来的时候就不停的刷，各位大侠解决下哈