*/
protected String[] getWorksheetNames(ConvertData cd)
throws IOException {
Enumeration e = cd.getDocumentEnumeration();
Workbook wb = (Workbook) e.nextElement();
Vector v = wb.getWorksheetNames();
e = v.elements();
String worksheetNames[] = new String[v.size()];
int i = 0;
while(e.hasMoreElements()) {
worksheetNames[i] = (String) e.nextElement();