function changetab(id)
{
	
	if(id == "2008p")
	{
		document.getElementById("2008a").style.display="inline";
		document.getElementById("2008p").style.display="none";
		document.getElementById("2009p").style.display="inline";
		document.getElementById("2009a").style.display="none";
		document.getElementById("2010p").style.display="inline";
		document.getElementById("2010a").style.display="none";
		document.getElementById("2011p").style.display="inline";
		document.getElementById("2011a").style.display="none";
	}
	
	if(id == "2009p")
	{
		document.getElementById("2009a").style.display="inline";
		document.getElementById("2009p").style.display="none";
		document.getElementById("2008p").style.display="inline";
		document.getElementById("2008a").style.display="none";
		document.getElementById("2010p").style.display="inline";
		document.getElementById("2010a").style.display="none";
		document.getElementById("2011p").style.display="inline";
		document.getElementById("2011a").style.display="none";
	}
	
	if(id == "2010p")
	{	
		document.getElementById("2010a").style.display="inline";
		document.getElementById("2010p").style.display="none";
		document.getElementById("2009p").style.display="inline";
		document.getElementById("2009a").style.display="none";
		document.getElementById("2008p").style.display="inline";
		document.getElementById("2008a").style.display="none";
		document.getElementById("2011p").style.display="inline";
		document.getElementById("2011a").style.display="none";
	}
	
	if(id == "2011p")
	{	
		document.getElementById("2011a").style.display="inline";
		document.getElementById("2011p").style.display="none";
		document.getElementById("2010p").style.display="inline";
		document.getElementById("2010a").style.display="none";
		document.getElementById("2009p").style.display="inline";
		document.getElementById("2009a").style.display="none";
		document.getElementById("2008p").style.display="inline";
		document.getElementById("2008a").style.display="none";
	}
}