|Well, the possibility of a third one going down may exist, but the probability of the first one going down is certainly higher. This happens, obviously, when one needs to use free hosting, with the unstability and lack of support this may represent.|
I only need an onerror function to trigger the checking sequence, doesn't have to be highly sophisticated. For example, in some pages I use something like this :
onerror='alert("Internet connection seems to be down.");' />
Something similar, but instead of creating an alert, redirecting the page to a second URL might work. And please, take note that I'm a novice as far as code is concerned.