referer opener parent的区别

http://zhcsmx22.blog.51cto.com/287943/108472
window.opener是当前页面A通过open方法弹出一个窗口B，那在B页面上 window.opener就是A
window.parent是当前页面C通过location.href转到新的页面D，那在D页面上window.parent就是B
或者是页面E里套一个frame为F，那F页面的window.parent就是E

A页面通过open方法打开B页面，B页面通过location打开C页面，C页面上刷新A页面
function refreshParenetWindow( refreshMethod ) { switch( refreshMethod ) { case "ButtonClick": oParentButton = window.parent.opener.document.getElementById( "btnSearch" ); oParentButton.click(); break; case "Location": window.opener.navigate(window.opener.location.href); break; default: window.opener.navigate(window.opener.location.href); break; } }
A页面通过open方法打开B页面，B页面通过open打开C页面，C页面上刷新A页面
在B页面的onunload事件中写一段刷新A页面的javascript方法，在C页面关闭的时候，关闭B页面，就可以实现。

document.referrer
This property returns a value only when the user reaches the current page through a link from the previous page. Otherwise, document.referrer returns an empty string; it also returns an empty string when the link is from a secure site.
For example, if PageA.htm includes a link to PageB.htm, and the user clicks that link, the document.referrer on PageB.htm returns "PageA.htm." However, if the user is on PageA.htm and types PageB.htm into the address line or chooses the Open command from the File menu to get to PageB.htm, the document.referrer returns an empty string.

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