OK. For starters, you should not be putting all this code into the Script window. The better way to do JS code in Captivate is to insert your functions in one of the JS files that Captivate will publish automatically and then just call the function from the Script window. You can find the default JS template files in the Captivate install directory.
However, I heartily recommend that you head over to Jim Leichliter's website at CaptivateDEV.com and purchase his excellent video course on Captivate Javascript. A little education will save you a lot of time and headaches.