Workaround for no cron?

I have to wait for my host to compile php as binary for cron to work with php, and a lot of things on my site depend on cron. Does anyone have some sort of code that I could put at the top of all my pages so when they get visited, it checks to see if a script has been executed yet this time petiod, and if not yet, it does? Or any type of workaround for not having cron? Thanks!