用PHP输出js，在firefox下 没用？？

[ygc2022]

我有下面一段代码，目的就是想关掉页面

<?php
echo "<script language='javascript'>window.opener=null; window.open('','_self'); window.close(); </script>";

在ie下能正常关闭

但是在firefox下，没有用，查看源代码，还是有js源代码。

我发现用Php echo的js代码，在firefox下好多都这样....

怎么解决

[LuciferStar]

window.opener似乎不支持。

[wyt49590931]

似乎不支持

[乌镇程序员]

跟是不是由PHP输出的没有关系。
在FF浏览器下面，window.close()只能关闭由脚本调用window.open()打开的窗口。
https://developer.mozilla.org/En/DOM/window.close
[QUOTE]
Description

When this method is called, the referenced window is closed.

This method is only allowed to be called for windows that were opened by a script using the window.open method. If the window was not opened by a script, the following error appears in the JavaScript Console: Scripts may not close windows that were not opened by script.
[/QUOTE]

输入about:config打开高级设置，修改下面一项的值为true才可以：
dom.allow_scripts_to_close_windows

[乌镇程序员]

这是一个处于安全性方面考虑的设置选项，目的是为了防止脚本程序胡乱关窗。