function showContent(number) {

for (i=0; i<10;i++) {

 var subName = "content" + i;

 if ( document.getElementById(subName) != null) {
 if (i==number) {
  document.getElementById(subName).style.visibility='visible';
  document.getElementById(subName).style.display='block';
 }
 else {
 document.getElementById(subName).style.visibility='hidden';
  document.getElementById(subName).style.display='none';
 }
 }
 }

}

function showPlayer() {
}

function hidePlayer() {
}