window.location or window.location.href?
参考：
1.http://www.javascriptkit.com/jsref/location.shtml
2.http://www.highdots.com/forums/javascript-discussion-multi-lingual/window-location-window-location-href-276539.html
Location contains information about the current URL of the browser. The most common usage of Location is simply to use it to automatically navigate the user to another page:
<script type="text/javascript"> window.location="http://www.google.com" </script>
所以推荐使用window.location，包含更多信息
理由（参考文章的第二篇）
Although "window.location.href" also seems to work. The "entire URL" href property (of window.location) appears to be a bit redundant. Other properties of "windows.location" could be useful for reading or changing portions of the URL like domain/host names and port numbers (which are sometimes not stated - permitted to remain the default).
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