akguindy, I can't see a new thread posted on August 4th on this topic. Can you provide a link to the thread?
Joylennon, bottom line is that Jerusalem isn't a practical day trip from Jordan. Long delays are common at the border (in both directions), and you might end up with only an hour or so in Jerusalem before having to leave so you can get back to the border before it closes. I'm assuming you're talking about the Allenby (King Hussein) Bridge crossing, as that's the only one anywhere near Jerusalem. Staying at least one night in Jerusalem would make much more sense.
Also, are you aware that in the next few weeks there are a lot of Jewish religious holidays that would have a very serious impact on your trip, if you're thinking of going in September or the first week in October? Read FAQ 52 for a summary of the dates and what you can expect.