// JavaScript Document to Toggle Images On/Off
// Specifically used on product_categories.asp to display & hide product model numbers

// Substitutes visibility property with display:
function toggleLayer(id) {
  var myLay = document.getElementById(id).style; 
  if(myLay.display == "none") {
  myLay.display = "block";  
  }
  else if(myLay.display == "block") {
  myLay.display = "none";
  }
}