oldsarg41

Could someone help me out with a slight problem that I am experiencing at the moment dealing with a Java Script and Mambo 4.6.2 Stable (Zeppy). I am in the middle of transferring my original site done in FrontPage, to Mambo, but have found that Mambo will not except the script nor some of the components used within the script, such as a form with a text area etc. The following link will give you an idea of what the form is and maybe give someone an idea as how I can use it in Mambo. policensw.com/region/stat1.html. There are three pages that are similar within the site.
I spent last night and a fair bit of today reading through the forum here seeking something on the same lines, but still have not quite found anything as yet.
Would it help if I installed another editor in Mambo?, and if so which one would do the job. I must confess that I know very little about programming and am very new to Mambo and web sites in general as you will no doubt see when you look at policensw.com, but I like doing it and I enjoy it.
Thank you in advance.

Kind regards
the old sarg