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| Image map ： ウィキペディア英語版 |
In HTML and XHTML, an image map is a list of coordinates relating to a specific image, created in order to hyperlink areas of the image to different destinations (as opposed to a normal image link, in which the entire area of the image links to a single destination). For example, a map of the world may have each country hyperlinked to further information about that country. The intention of an image map is to provide an easy way of linking various parts of an image without dividing the image into separate image files.
==Server-side==
Server-side image maps were first supported in Mosaic (web browser) version 1.1. Server-side image maps enable the web browser to send positional information to the server about where the user clicks within an image. This allows the server to make pixel-by-pixel decisions about what content to return in response (possible methods are to use image mask layers, database queries, or configuration files on the server).
The HTML code for this type of server-side image map requires the
![]()
... and the ![]()
ismap attribute.
When the user clicks inside the image the browser will append the X and Y coordinates (relative to the upper-left corner of the image) to the anchor URL as a query string and will access the resulting URL (for example,
/imagemapper?3,9).If the browser does not support
ismap then the query string must not be added to the anchor URL and the server should respond appropriately (for example, by returning a text-only navigation page).抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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