function HideAbouts () {
document.getElementById("about_1").style.display = "none";
document.getElementById("about_2").style.display = "none";
document.getElementById("about_3").style.display = "none";
document.getElementById("about_4").style.display = "none";
document.getElementById("about_5").style.display = "none";
document.getElementById("about_6").style.display = "none";
document.getElementById("about_7").style.display = "none";
document.getElementById("about_8").style.display = "none";
document.getElementById("about_9").style.display = "none";
document.getElementById("about_10").style.display = "none";
document.getElementById("about_11").style.display = "none";
document.getElementById("about_12").style.display = "none";
document.getElementById("about_13").style.display = "none";
document.getElementById("about_14").style.display = "none";
document.getElementById("about_15").style.display = "none";
  }

function media_menu (id)
{
 if (document.getElementById("about_" + id).style.display == "none")
   {
	HideAbouts();
	document.getElementById("about_" + id).style.display = ""; 
   }
  else
   {
	document.getElementById("about_" + id).style.display = "none"; 
   }
} 

/*
<a href="javascript:media_menu('1')">
<div id="about_1" style="display: none">
*/