var currentPanel;
   
   function showPanel(panelNum) {
      //hide visible panel, show selected panel, 
      //set tab
      if (currentPanel != null) {
         hidePanel();
      }
      document.getElementById 
         ('panel'+panelNum).style.visibility = 'visible';
         currentPanel = panelNum;
         setState(panelNum);
      document.getElementById
        ('tab'+currentPanel).style.color = 'black';		
      document.getElementById
        ('tab'+currentPanel).style.fontWeight = 'bold';		
   }
   
   function hidePanel() {
      //hide visible panel, unhilite tab
      document.getElementById
        ('panel'+currentPanel).style.visibility = 
         'hidden';
      document.getElementById
        ('tab'+currentPanel).style.background = 
        '#edf0f7';
      document.getElementById
        ('tab'+currentPanel).style.color = '#999999';
      document.getElementById
        ('tab'+currentPanel).style.fontWeight = 'normal';			
   }
 
   function hidePanel2() {
      //hide visible panel, unhilite tab
      document.getElementById
        ('panel0').style.visibility = 
         'hidden';
      document.getElementById
        ('tab1').style.background = 
        '#edf0f7';	
         document.getElementById
           ('tab1').style.color = '#999999';
         document.getElementById
           ('tab1').style.fontWeight = 'normal';		   
   }
 
   function hidePanel3() {
      //hide visible panel, unhilite tab
      document.getElementById
        ('panel0').style.visibility = 
         'hidden';
      document.getElementById
        ('tab1').style.backgroundColor = 
        '#ffffff';
         document.getElementById
           ('tab1').style.fontWeight = 'normal';			   
		   
   } 
 
   function setState(tabNum) {
      if (tabNum==currentPanel) {
         document.getElementById 
           ('tab'+tabNum).style.backgroundColor = 
           '#ffffff';
         document.getElementById
           ('tab'+tabNum).style.color = 'black';	
         document.getElementById
           ('tab'+tabNum).style.background = 'white url(/portugal/seguranca/images/homepage/tab_lines.gif) no-repeat top left';		   
      }
      else {
         document.getElementById
           ('tab'+tabNum).style.backgroundColor = 
           '#ffffff';
         document.getElementById
           ('tab'+tabNum).style.color = '#ffffff';
         document.getElementById
           ('tab1').style.color = 'black';
	   
      }
   }
   
   function hover(tab) {
      tab.style.backgroundColor = '#ffffff';	  
   }