js跳出iframe

(1)session过期后登陆页面跳出iframe页面问题
登陆页面增加javascript：
function window.onload(){
if(window.parent.length>0)
window.parent.location=location;
}

或者：
if (window != top){
top.location.href = location.href;
}
(2)自动跳出iframe的代码
<script type="text/javascript">
if (top.location !== self.location) {
top.location=self.location;
}
script>
(3)在框架页内的退出操作：
<script type="text/javascript">
if (top.location !== self.location) {
top.location = "../index.jsp";//跳出框架，并回到首页
}
script>