home *** CD-ROM | disk | FTP | other *** search
-
- About Maps
-
-
-
- Webmaps is also called clickable pictures. When the
- user click on the picture, he's linked to different
- pages depending on where on the picture he clicked.
- A map isn't written in the same way as a HTML file.
-
- Webmaps consists of two files, a gif picture and the
- map file. It's written in a special file, and must be
- supported by the server. Talk to the administrator
- to find out if the server support maps. If it does,
- it can either be in CERN format, NCSA format or both.
- CERN is the company which originally developed the
- WWW, and NCSA has created, for example, Mosaic. Maps
- uses a cgi-script (like a program) to run, but you
- can define the map within the HTML file if the user
- has a newer browser such like Netscape 2.0. These
- maps is called Client Side Image maps.
-
-
-
-
- NCSA format
-
-
-
- In the NCSA format, all objects are separated with
- return characters. The list of objects starts with
- the objects ordered from the front to the back. It
- ends with the default url.
-
- # text
- Defines a comment, not used by the browser.
-
- rect url x,y x,y
- Defines a rectangle.
-
- circle url x,y x,y
- Defines a circle. x,y is the center point and the edge point.
-
-
-
- oval url x,y x,y
- Defines an oval. x,y x,y is the rectangle of the oval.
-
- poly url x,y...x,y
- Defines a polugon. Each 'x,y' specifies a point.
-
- point url x,y
- Defines a point at x,y.
-
- default url
- Defines the default URL (locations where no other
- objects are defined. Must be after the objects.
-
-
-
- url is always the URL (address) to the page which
- will be linked.
-
- CERN format
-
-
- In the CERN format, all objects are separated with
- return characters. The list of objects starts with
- the default url, followed by the objects ordered
- from the back to the front.
-
-
- # text
- Defines a comment, not used by the browser.
-
- default url
- Defines the default URL (locations where no other
- objects are defined. Must be before the objects.
-
- rect (x,y) (x,y) url
- Defines a rectangle.
-
- circle (x,y) rad url
- Defines a circle specified by it's center point and radius.
-
-
- poly (x,y)...(x,y) url
- Defines a new polygon specified by a number of (x,y)'s.
-
- url is always the URL (address) to the page which
- will be linked.
-
- Client Side map format
-
-
- Each object is separated by a linebreak (return). The
- objects is stored in order from the back to the front.
- If the user clicks in an area which is not specified as
- an object, there will be no action. See the 'picture'
- chapter for more about how to call and use these maps.
-
- <MAP NAME=text>
- Start tag of the map definition. Must end with </MAP>.
- NAME is the anchor, used by the IMG tag to locate the map
-
- <AREA [SHAPE=rect|circ[le]|poly[gon]] COORDS=x,y,x,y
- [NOHREF] [HREF=url] [ALT=text] [TARGET=text]>
- Indicates a map object. If SHAPE is not given, RECT will
- be used. HREF is the url to which a click in the object
- will point. NOHREF will not make an action. COORDS is the
- coordinates for the object. With the shape RECT, it's
- written as "left,top,right,bottom". With the shape CIRCLE,
- use "center_x,center_y,radius" and with the shape POLYGON,
- use "x1,y1,x2,y2...". ALT is the text to be showed if the
- browser can't display the picture, the same as ALT in IMG.
- TARGET is a Netscape extension which opens the link in a
- (new) window or frame named "text". If text is "_blank",
- the window will be unamed. If it is "_self", the current
- window or frame will be used.
-