flash (macromedia): here is a little tut from kirupa
http://www.kirupa.com/developer/flash5/preloader.htm

Dan

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how exactly does a preloader work? im doing a site that is displaying images
and i would like to be able to freely place a pre loader anywhere the image
loades but i dont understand how they work. is it just code that you place
before the keyframe of th image or the tween into the image? can somebody
explain this to a beginner?

They continuosly checking (either by using a setInterval or onEnterFrame loop)
the getBytesLoaded() and getBytesTotal() properties of a movieclip. So, you can
get the percent by doing:

myMC.getBytesLoaded()/myMC.getBytesTotal()*100

where myMC is the movieclip you are preloading.

And then you can use the MovieClip's Drawing Methods, to draw a bar depending
on the percent.

If you are using MX04, I recommend the MovieClipLoader class. It has an
onLoadProgress event. So in that case, it just means you have some code that
runs every time there is progress in the loading. Remember that when you are
loading (regardless of whether you use loadMovie or MovieClipLoader) the
original contents of the movie you are loading into will be replace ? artwork,
code, mouseEvents, etc. So you won't want to put the pre-loader in the same
clip as the movie you are loading into. Additionally a lot of people have code
in there that does something once the external file is loaded. You know: scale
it, fade it in, fly it onto the stage, etc. Depending upon what you are trying
to do, this part can be a bit tricky.

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SWF, Lock & Load creates Flash preloaders.

Hi i have created a flash site, but feel i need a preloder as it runs rather
slow could u please suggest where and how i can place a pre loder and the best
option please? thanx the site is at http:/www.mpgcontracts.com