Window Location

"window.location.href"、"location.href"是本页面跳转

"parent.location.href"是上一层页面跳转

"top.location.href"是最外层的页面跳转

举例说明：

如果A,B,C,D都是jsp，D是C的iframe，C是B的iframe，B是A的iframe，如果D中js这样写

"window.location.href"、"location.href"：D页面跳转

"parent.location.href"：C页面跳转

"top.location.href"：A页面跳转

如果D页面中有form的话,

<form>: form提交后D页面跳转

<form target="_blank">: form提交后弹出新页面

<form target="_parent">: form提交后C页面跳转

<form target="_top"> : form提交后A页面跳转

关于页面刷新，D 页面中这样写：

"parent.location.reload();": C页面刷新 （当然，也可以使用子窗口的 opener 对象来获得父窗口的对象：window.opener.document.location.reload(); ）
"top.location.reload();": A页面刷新

Window Location
http://www.w3schools.com/js/js_window_location.asp
The window.location object can be written without the window prefix.

Some examples:

    location.hostname returns the domain name of the web host
    location.path returns the path and filename of the current page
    location.port returns the port of the web host (80 or 443)
    location protocol returns the web protocol used (http:// or https://)

Window History
http://www.w3schools.com/js/js_window_history.asp
The window.history object can be written without the window prefix.

To protect the privacy of the users, there are limitations to how JavaScript can access this object.

Some methods:

    history.back() - same as clicking back in the browser
    history.forward() - same as clicking forward in the browser