// DISPLAY OR HIDE CERTAIN ELEMENTS BY ID
function showItem(id,force) {
  if (document.getElementById) {
    obj = document.getElementById(id);
    if(obj) {
      if(force) { obj.className = obj.className + " " + force;}
      else { 
        if(obj.className.match("hidden")) { obj.className = obj.className.replace(/hidden/, "shown"); }
        else if (obj.className.match("shown")) {  obj.className = obj.className.replace(/shown/,"hidden");  }
        else {obj.className = obj.className + " shown"; }
      }
    }
  }
}