js关闭当前页面比较兼容的办法

function CloseWebPage(){    if (navigator.userAgent.indexOf("MSIE") > 0) {        if (navigator.userAgent.indexOf("MSIE 6.0") > 0) {            window.opener = null;            window.close();        } else {            window.open('', '_top');            window.top.close();        }    }    else if (navigator.userAgent.indexOf("Firefox") > 0) {        window.location.href = 'about:blank ';    } else {        window.opener = null;        window.open('', '_self', '');        window.close();    }}