How would you go about running a script every 4 minutes say....I'm wanting my app to send a email out and if its not been dealt with within 10minutes (approx) I want another email to be sent, this should repeat untill it has been dealt with.So is there a way to have a script keep running? I suppose I could do this by having it make a page which uses Javascript to refresh the page every 4 minuts but I'd prefer it if I could do it without a computer needing to have a page open like that.