advice re client side image maps
by "John Aitchison" <jaitchis(at)hwy.com.au>
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| Date: |
Sat, 3 Nov 2001 19:49:58 +1100 |
| To: |
Hwg-basics(at)hwg.org |
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todo: View
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gidday
I am new to imagemaps and would like some advice so that I can
avoid the obvious traps for 'young' players.
What I would like to do is use a (real) tree graphic on the 'entry'
page, where branches and leaves are clickable.
(In case you are saying .. don't have a front door with very little
information and links on it 'cos it just delays and irritates the visitor ..
I agree in general, but there are some special circumstances here :
the front door won't necessarily be the main point of entry, but if
people backtrack to it, it will present a unifying view - sort of an
organizational map)
The tree graphic could be a bit on the large side and I will make
strenuous efforts to keep the size down with some gif optimizers or
whatever, but I don't want to use sliced images. Not only don't I not
know how to do them (ie make the slices), I just don't like the look
when they download in bits particularly over a slow connection. Am I
being too rigid here?
OK, if the graphic is being downloaded in one hit and might be a bit
slow I probably need to do something like provide a site menu off to
the left, or maybe embed the graphic in the center of a table that
has some textual links.
Q1. What controls the order in which bits of the page are loaded?. If
I have a table with some text and a graphic, is there any assurance
that the text will be loaded first?
Now to image maps.
I don't think I want to consider server side image maps - that looks
just too kludgy and hard to implement. Am I wrong?
Client side image maps
Q2. From my initial research (well, googling) it seems that client side
image maps are supported by later browsers only ? Is so? not so?
Any browser specific issues that I need to look out for?
Q3. I am unclear as to whether I can declare a polygon in a client
side image map?
Q4. Generating the imagemap HTML and all the funny coordinates ..
seems like I need a special prog for this .. MapEdit from
www.boutell.com seems to be frequently mentioned. Comments?
Alternatives? (I see also that Photoshop 5.5 with ImageReady or
somesuch can do this, but I don't have Photoshop 5.5)
Q5. Netscape seems to support a low resolution and faster loading
version with the LOWSRC directive .. does this work OK? worth
doing?
Q6. It seems I can do an imagemap with a JPG also. At least
according to
http://developer.netscape.com/docs/manuals/htmlguid/tags8.htm
Is there a good reason to stick with GIF? I don't have any evidence
for this but I would have thought that a JPEG would offer
compression as good as a GIF
Q7. I can apparently make any of the links open a new window with
target=_blank ; what I am groping towards is the concept of a
central "siteimagemap" window that is always present (possibly
chromeless) and that serves as the central navigation device. I am
none too clear on this myself, so I guess this is a non question, just
an "I wish"
Well, thanks in advance for any comments/suggestions/ideas on this
one and thanks for all the guidance I have received in the past..like
a lot of people I am an incremental and somewhat slow learner and
feedback from a group like this really helps me along.
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