onAfterSplit

fires after a span was removed

void onAfterSplit(number row,number column,array value, [string page] );

row	number	the number of the row that the span starts with
column	number	the number of the column that the span starts with
value	array	the array with values of the deleted span
page	string	the name of the sheet

$$("ssheet").attachEvent("onAfterSplit", function(row, column, value, page){
    // some code here
    return true;
});