referrer参数属性

Retrieves the URL of the location that referred the user to the current page.

dhtml语法

[ sUrl = ] document.referrer

DHTML可能的值

sUrl Stringthat specifies the URL of the referring page.
The property is read-only. The property has no default value.

Remarks

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 uses Open in the File menu to get to PageB.htm, the document.referrer returns an empty string.

是否符合公共标准

This property is defined in World Wide Web Consortium (W3C) Document Object Model (DOM) Level 1 .

Applies To

document