How exactly does a background fader script work???

[Nick]

Does a background fader work by...


A) Changing the color after a long 'loop' statement???

B) Changing the color, then waiting a bit, then changing the color
again???


To me it seems B would be less cpu/browser intensive. Does anyone know
how exactly this works and an example script? Thanks! -Nick

[Evertjan.]

Re: How exactly does a background fader script work???

Nick wrote on 18 jul 2003 in comp.lang.javas cript:
[color=blue]
> Does a background fader work by...
>
>
> A) Changing the color after a long 'loop' statement???
>
> B) Changing the color, then waiting a bit, then changing the color
> again???
>
>
> To me it seems B would be less cpu/browser intensive. Does anyone know
> how exactly this works and an example script? Thanks! -Nick
>[/color]

<http://www.google.com/search?q=%22bac kground%20fader %22%22javascrip t%22>

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--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

[Nick]

Re: How exactly does a background fader script work???

Well I found a good simple example script.

The setTimeout() function was the snip I guess I was looking for. Ive
seen many other scripts that just rely on a loop to change the colors
- the problem though - faster cpu, the faster colors change; not very
uniform. The setTimeout() fixes that. Here it is!!!



<script language="Javas cript">
// 'i' increments the RGB values
// 't' changes the frequency of time
var t = "10";
function fader(i) {
var RGBstring = "rgb("+i+","+i+ ","+i+")";
document.bgColo r = RGBstring;
setTimeout("fad er("+(i-1)+")",t);
}
</script>

<FORM NAME="backgroun d">
<INPUT TYPE="button" VALUE="Start" onClick="fader( 255)">
</FORM>