rollover.js 2013 made me sweat!
It gets into a infinite loop and block the page when temp == ""
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while(temp.lastIndexOf(this.separator)==temp.lengt h-1)
temp=temp.substring(0,temp.length-1);
this.openedItems=temp;
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in rollover.js 2011 you have:
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while ((temp.lastIndexOf(this.separator) == temp.length - 1) && (temp != ""))
temp = temp.substring(0, temp.length - 1);
this.openedItems = temp;
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This looks like a mistake in the code of rollover.js 2013....

Is there an update of NOF 2013 that would pick-up that kind of bugs without necessarily going to NOF 2015 which could also have its load of bugs?