// JavaScript Document

function showHide(elementId){
   var element = document.getElementById(elementId);
   if(element.style.display=='none' || element.style.visibility=='hidden'){
      element.style.display = '';
      element.style.visibility = 'visible';
   }
   else{
      element.style.display = 'none';
      element.style.visibility = 'hidden';
   }
}