Sorry I can't help you with the combinations...
But you cut and paste by using:
RightAmiga+c to copy and
RightAmiga+v to paste
If your browser doesn't support the "URL" "IMG" "EMAIL" etc. javascript buttons then you can type the commands in manually in the textbox.
Amiga Humor LinkTry to look at the source code to my above link in your browser you'll then see how it's done :-)