Javascript "Javascript Master"

Hi,

I am very sceptical whether this challenge is even possible. I am reverse engineering the javascript and I only got as far as the "temp" number just before the final loop. From the last few digits of that number you should be able to get a step further again, but none of the combinations actually converts into those digits.....

Could you please check if  the javascript in this challenge actually works?

mego

PS: I can give more details, but I don't want to spoil the fun.