ns4 = document.layers;
ie4 = document.all;
nn6 = document.getElementById && !document.all;

function hideObject() {
  if (ns4) {
     document.n1.visibility = "hide";
  }
  else if (ie4) {
     document.all['n1'].style.visibility = "hidden";
  }
  else if (nn6) {
     document.getElementById('n1').style.visibility = "hidden";
  }
}

function showObject(e) {
   
  if (ns4) {
     document.n1.visibility = "show";
     document.n1.left = e.pageX;
     document.n1.top = e.pageY;
  }
  else if (ie4) {
     document.all['n1'].style.visibility = "visible";
     document.all['n1'].style.left = e.clientX;
     document.all['n1'].style.top = e.clientY;
  }
  else if (nn6) {
     document.getElementById('n1').style.visibility = "visible";
     document.getElementById('n1').style.left = e.clientX;
     docume.getElementById('n1').style.top = e.clientY;
  }
}