html table data,HtmlDataTable

Return the value of the columnClasses property.

Contents: Comma-delimited list of CSS style classes that will be applied

to the columns of this table. A space separated list of

classes may also be specified for any individual column. If

the number of elements in this list is less than the number of

actual column children of the UIData, no "class"

attribute is output for each column greater than the number of

elements in the list. If the number of elements in the list

is greater than the number of actual column children of the

UIData, the elements at the posisiton in the list

after the last column are ignored.