Wysiwg Page Layout Script 2

I want a script which will visually design web page layouts, like:

– The user will see an empty container (like an empty page).
– With some type of action (I prefer with a right click drop menu), to be able:

1.- Insert rows
2.- Remove rows
3.- Insert columns
4.- Remove columns
5.- Split cell vertically
6.- Split cell horizontally
7.- Mark a series of cells (eg 3 horizontally or 2 vertically) and merge them.

This way the user will be able to define the layout as he wants. Then he …