document.write("<option selected value=index.html>-------- Main Menu --------</option>");
document.write("<option value=dental_instruments_index.html>Dental Instruments</option>");
document.write("<option value=manicure_instruments_index.html>Manicure Instruments</option>");
document.write("<option value=surgical_instruments_index.html>Surgical Instruments</option>");
document.write("<option value=veterinary_instruments_index.html>Veterinary Instruments</option>");