function combo1() {
  document.all.contents1.style.display="block";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
}

function combo2() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="block";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
}

function combo3() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="block";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
}
function combo4() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";

}

function combo5() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="block";
  document.all.contents6.style.display="none";
}

function combo6() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="block";
}

/*function combo7() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
  document.all.contents7.style.display="block";
}
function combo8() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
  document.all.contents7.style.display="none";
  document.all.contents8.style.display="block";
}
function combo9() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
  document.all.contents7.style.display="none";
  document.all.contents8.style.display="none";
  document.all.contents9.style.display="block";
}
function combo10() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
  document.all.contents7.style.display="none";
  document.all.contents8.style.display="none";
  document.all.contents9.style.display="none";
  document.all.contents10.style.display="block";
}
function combo11() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
  document.all.contents7.style.display="none";
  document.all.contents8.style.display="none";
  document.all.contents9.style.display="none";
  document.all.contents10.style.display="none";
  document.all.contents11.style.display="block";
}
function combo12() {
  document.all.contents1.style.display="none";
  document.all.contents2.style.display="none";
  document.all.contents3.style.display="none";
  document.all.contents5.style.display="none";
  document.all.contents6.style.display="none";
  document.all.contents7.style.display="none";
  document.all.contents8.style.display="none";
  document.all.contents9.style.display="none";
  document.all.contents10.style.display="none";
  document.all.contents11.style.display="none";
  document.all.contents12.style.display="block";
}
*/