I have modified these functions based on your comments on my previous commit 0e3d519
I will change the other functions as well. And I will submit my commits later.
Add getTitle(), setTitle(value), remove(), getRows() for grid group i…
Your comments can be found at pull request #702
One question about the clear() function. Your suggestion is to simply set this.innerHTML = "".
But that will also clear the title, since title is also the child of the group. Is this the desired behaviour of the clear() function?