Below is a static table where one column contains checkbox inputs.
To handle these the method getRowValue is overriddden to
support a new type called CheckBox.
Since there is a bug in IE that makes the inputs lose their value
after the DOM node is moved in the tree we backup the input value before
the sort (using onbeforesort and restore it afterwards.
| String | String | Number | Date | No Sort | |
| apple | Strawberry | 45 | 2001-03-13 | Item 0 | |
| Banana | orange | 7698 | 1789-07-14 | Item 1 | |
| orange | Banana | 4546 | 1949-07-04 | Item 2 | |
| Strawberry | apple | 987 | 1975-08-19 | Item 3 | |
| Pear | blueberry | 98743 | 2001-01-01 | Item 4 | |
| blueberry | Pear | 4 | 2001-04-18 | Item 5 |