function show1(section1,section2,section3)
	{
		document.getElementById(section1).style.display='block';
		document.getElementById(section2).style.display='none';
		document.getElementById(section3).style.display='none';
	}
	
	function show2(section1,section2,section3)
	{
		document.getElementById(section2).style.display='block';
		document.getElementById(section1).style.display='none';
		document.getElementById(section3).style.display='none';
	}

	function show3(section1,section2,section3)
	{
		document.getElementById(section1).style.display='none';
		document.getElementById(section2).style.display='none';
		document.getElementById(section3).style.display='block';
	}