cms builder and adding javascript

Hello,

I want to add a calendar by using java script to my web site.

I am a web developer and have purchased "availability booking calendar" software from www.availabilitybookingcalendar.com

I am in need of some education as to exactly how and at what point do I put this javascript code when they say "put the javascript at the location where you want the calendar to go".

I got an answer about another script line and your support person said it goes at the top of the web page. It is a link to some css style sheets.

Thank you.