> A few weeks ago I put together this little map 
> applicationhttp://xfsd.ansorg-web.de/fsdmap/(it shows position of pilots
> connected to a server, not always people there)

I left it ticking over in FF2, there were 4 'pilots'.

Eventually Firebug flagged an error in javascript, the API complaining
about Nan - not a number.
Backtracking in Firebug shows your parseData() was working on this XML
- (snippet)
<?xml version="1.0" encoding="UTF-8"?>\n
<!DOCTYPE clients SYSTEM "clients.dtd">\n
<clients timestamp="1238370545"><client type="P" cs="LUCA13"
name="Luca Ganz LIML" rating="11" \r\n
 cid="XP12" acf="" from="" to="" \r\n
 route="" lat="" lng="" alt="" gs=""></client><client type="P"
cs="DPNY" name="Don Pickett KLGA" rating="11" \r\n
 cid="XP57" acf="1/B1/H-S/C" from="PM01" to="PHNL" \r\n
 route="STINS +38.982 -122.111 MXW11 +40.099 -122.236 ......

I'd say your php has served up some null parameters for pilot
LUCA13.   If you can't figure out why, you might need to beef up your
parseData() to deal with this.  The map API won't like being fed empty
data, the rspose will vary across browsers, and may well vary between
API releases.

I haven't looked at your code in great detail, but I think it adds a
new 'track' polyline everytime it updates.  You might want to consider
removing the old one to prevent ever increasing resource consumption.

cheers, Ross K


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