for (i=1; i <= 50; i++)
{
	if (document.getElementById("Layer"+i))
		document.getElementById("Layer"+i).style.display = "none"
}

function displayToggle(id) {
  var el = document.getElementById(id).style;
      
  if(el.display == "none") {
  el.display = "block";  
  }
  else if(el.display == "block") {
  el.display = "none";
}
}

function showDisplay(id,display) {
 document.getElementById(id).style.display=display;
}