What client-side web scripting languages are there other than JavaScript and VBScript?

Question

1. How many client-side scripting language implementations did you see except JavaScript and VBScript? Like: type=\"text/C++Script\",

Answer 1

1. Is already answered above.
2. If you want to learn if browser supports languages that you already know the best is to embed their small snippets into page or inject using innerHTML from JavaScript. These scripts should then set some global property like window['scripts']['oberon']=true; this way you will learn that language type was detected indeed.