javascript中的location.href有很多种用法，主要如下。
self.location.rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="/url" 当前页面打开URL页面
location.rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="/url" 当前页面打开URL页面
windows.location.rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="/url" 当前页面打开URL页面，前面三个用法相同。
this.location.rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="/url" 当前页面打开URL页面
parent.location.rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="/url" 在父页面打开新页面
top.location.rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="/url" 在顶层页面打开新页面
如果页面中自定义了frame，那么可将parent self top换为自定义frame的名称,效果是在frame窗口打开url地址
此外，window.location.href=window.location.href;和window.location.Reload()和都是刷新当前页面。区别在于是否有提交数据。当有提交数据时，window.location.Reload()会提示是否提交，window.location.href=window.location.href;则是向指定的url提交数据