var panels = new Array('panel1', 'panel2', 'panel3', 'panel4', 'panel5', 'panel6', 'panel7', 'panel8', 'panel9', 'panel10', 'panel11', 'panel12');
 var selectedTab = null;
 function showPanel(tab, name)
 {
   if (selectedTab) 
   {
     selectedTab.style.backgroundColor = '';
     selectedTab.style.paddingTop = '';
     selectedTab.style.paddingBottom = '';
   }
   selectedTab = tab;
   selectedTab.style.backgroundColor = 'white';
   selectedTab.style.paddingTop = '6px';
   selectedTab.style.marginTop = '0px';
   for(i = 0; i < panels.length; i++)
   {
     document.getElementById(panels[i]).style.display = (name == panels[i]) ? 'block':'none';
   }
   return false;
 }