function cambiaTipoInput(oldObject, oType) {
  var newObject = document.createElement('input');
  newObject.type = oType;
  if(oldObject.size) newObject.size = oldObject.size;
  if(oldObject.value) newObject.value = oldObject.value;
  if(oldObject.name) newObject.name = oldObject.name;
  if(oldObject.id) newObject.id = oldObject.id;
  if(oldObject.className) newObject.className = oldObject.className;
  oldObject.parentNode.replaceChild(newObject,oldObject);
  return newObject;
}
/*
function cambiaTipoInput(oldId,newId,idReferencia,newTipo){
if (Object.inspect($(newId)) == 'null'){
	var html = "<input type='" + newTipo + "' name='" + $(oldId).name + "' id='" + newId + "' size='" + $(oldId).size + "' maxlength='" + $(oldId).maxlength + "' class='" + $(oldId).className + "' value='' /> ";
	$(oldId).remove();
	$(idReferencia).insert({after:html});
	$(newId).focus();
}

}*/