function hasType(obj) {
     var result = false;
     if (obj.getAttributeNode("type") != null) {
         result = (obj.getAttributeNode("type").value == "hidden");
     }
     return result;
  }   
  
  function fixHiddenInputs() {
     var inputs = document.getElementsByTagName("input");
     
     for (var i = 0; i < inputs.length; i++) 
     {
        var input = inputs[i];
        
        if (hasType(input)) {
               input.style.visibility = "hidden";
        }
        
     }
  }