shown='education';
subshown='workexp';

function show(section){
  var showdiv=document.getElementById(section);
  var hidediv=document.getElementById(shown);
  var hidesubdiv=document.getElementById(subshown);
  
  hidediv.style.display="none";
  hidesubdiv.style.display="none";
  
  showdiv.style.display="";
  shown=section;
}

function subshow(section){
  var showdiv=document.getElementById(section);
  var hidediv=document.getElementById(subshown);

  hidediv.style.display="none";
  showdiv.style.display="";
  subshown=section;
}