var IE =document.getElementById?true:false;
var IE4 = document.all?true:false;

function hideIt(layerName) {  
 if (IE) {document.getElementById(layerName).style.visibility='hidden';}
 if (document.layers) {document.layers[layerName].visibility='hide';} 
}

function showIt(layerName) {
  if (IE) {document.getElementById(layerName).style.visibility='visible';}
  if (document.layers) {document.layers[layerName].visibility='show';}
}
function placeIt(layerName) {
	showIt(layerName);
}