to switch the class of tabs between tab_cell_label and
tab_cell_edit when different tabs are selected.
" } "
" $('tabdiv'+previously_selected_tab).style.display = 'none'; "
" $('tabdiv'+which_tab).style.display = 'block'; "
+ " $('tabtd'+previously_selected_tab).className = 'tab_cell_edit'; "
+ " $('tabtd'+which_tab).className = 'tab_cell_label'; "
" previously_selected_tab = which_tab; "
"} "
"</script> \n"