页面关闭浏览器兼容
1，chrome5.0
2，ie7
3，opera10.5
4,safari5.0
三，测试
序号 关闭代码 需要确认 无任何作用 无需确认 测试
1window.close()IE7firefox,chrome,
safariOperaClose
2window.opener=null;
window.open('','_self');
window.close();firefoxIE7,Opera，
chrome,safariClose
3window.open('','_self');
window.close();firefoxIE7,Opera，
chrome,safariClose
4window.opener=null;
window.close();IE7firefox，safarichrome,OperaClose
5var opened=window.open('about:blank','_self');
opened.opener=null;
opened.close();firefoxsafari,IE7,
chrome,OperaClose
6var opened=window.open('about:blank','_self');
opened.close();safari,firefoxIE7,
chrome,OperaClose
