I solved it like this:
var isChrome = (window.chrome != null ? true : false);
if(isChrome){
var current = new Date();
var timedifference = current.getTime() - autorefreshtimeoutcounter.getTime();
if(timedifference >= (15*60000)){
autorefreshtimeoutcounter = new Date();
}
}
I'm always open for better suggestions as I see this as a workaround, rather than a real solution.
Call me lazy, but I didn't want to start debugging and searching both JQuery and JQPlot libraries for a memory leak.