var pObj;

function show(obj) {
  if(document.all) eval(obj + ".style.visibility = \"visible\"\;");
  else if(document.getElementById) eval("document.getElementById('" + obj + "').style.visibility = \"visible\"\;");
}

function hide(obj) {
  if(document.all) eval(obj + ".style.visibility = \"hidden\"\;");
  else if(document.getElementById) eval("document.getElementById('" + obj + "').style.visibility = \"hidden\"\;");
}

function showTeaser(obj){ hide(pObj); pObj=obj; show(pObj); }