document.write("<option value=\"1963.html\">HBO short-arc mercury vapour lamps for microlithography</option> "); document.write("<option value=\"1964.html\">HBO short-arc mercury vapour lamps for microlithography 2</option> "); document.write("<option value=\"1965.html\">HBO short-arc mercury vapour lamps</option> "); document.write("<option value=\"1966.html\">Special lamps for IR applications</option> "); document.write("<option value=\"1967.html\">HBO short-arc mercury vapour lamps 2</option> ");