function showDiv(num)
{
 for(var id = 1;id<=4;id++)
 {
  var ss="about"+id;
  var nss="aboutnav"+id;
  if(id==num){
  try{document.getElementById(ss).style.display="block"}catch(e){};
  try{document.getElementById(nss).className="active"}catch(e){};
  }else{
  try{document.getElementById(ss).style.display="none"}catch(e){};
  try{document.getElementById(nss).className=""}catch(e){};
  }
 }  
}

  function setTab(n){
  var tli=document.getElementById("tabmenu").getElementsByTagName("li");
  var mli=document.getElementById("postBoxContent").getElementsByTagName("ul");
  for(i=0;i<tli.length;i++){
     tli[i].className=i==n?"active":"";
     mli[i].style.display=i==n?"block":"none";
  }
  }