// JavaScript Document
function show(n)
{
   for(i=1;i<=document.getElementById('ss').getElementsByTagName('p').length;i++)
   {
	   document.getElementById('s'+i).style.display="none";
	   document.getElementById('st'+i).className="";
   }
       document.getElementById('s'+n).style.display="block";
	   document.getElementById('st'+n).className="current";
}