function changePage(s)
{
	for(var i=1;i<5;i++)
	{
		var currentPage = "page"+i;
		if(i==s)
		{
			document.getElementById(currentPage).style.display="block";
			document.getElementById('tab'+i).className = 'sectionTabSelected';		
		}
		else
		{
			document.getElementById(currentPage).style.display="none";
			document.getElementById('tab'+i).className = 'sectionTab'
		}
	}
}