var currentPanel;
   var currentVideoPanel;
   
   function showPanel(panelNum)
   {
    if(currentPanel != null)
    {
       hidePanel();
    }
    document.getElementById('menu'+panelNum).className = 'menu_on';
    document.getElementById('menu'+panelNum+'txt').className = 'show';
    currentPanel = panelNum;
   }
   
   function hidePanel()
   {
    //Hide Visible Panel
    document.getElementById('menu'+currentPanel).className='menu_off';
    document.getElementById('menu'+currentPanel+'txt').className='hide';
   }
   
   //for showcase page [needs colours]
   function showPanelShowcase(panelNum)
   {  
    if(currentPanel != null)
    {
       hidePanel();
    }
    document.getElementById('menu'+panelNum).className = 'menu_on'+panelNum;
    document.getElementById('menu'+panelNum+'txt').className = 'show';
    currentPanel = panelNum;
   }