I'm having problems on Firefox 15 and Chrome 21 with the following code:

setInterval(function () { console.log('test') }, 300000000000)

On both browsers, the function is run right away repeats very quickly. Sure, that's a big number (representing about 10 years from now), but I wouldn't expect it to be treated as a tiny or negative number. I haven't seen a maximum allowed delay in any documentation. Does anyone know if there's a standard max, or if this is just the browsers being funny?