// JavaScript Document
function show1() {document.getElementById('drop_down1').style.visibility="visible";}
function hide1() {document.getElementById('drop_down1').style.visibility="hidden";}
function show2() {document.getElementById('drop_down2').style.visibility="visible";}
function hide2() {document.getElementById('drop_down2').style.visibility="hidden";}
function show3() {document.getElementById('drop_down3').style.visibility="visible";}
function hide3() {document.getElementById('drop_down3').style.visibility="hidden";}
function show4() {document.getElementById('drop_down4').style.visibility="visible";}
function hide4() {document.getElementById('drop_down4').style.visibility="hidden";}
function show5() {document.getElementById('drop_down5').style.visibility="visible";}
function hide5() {document.getElementById('drop_down5').style.visibility="hidden";}