function show_firstpage() {
	if (document.getElementById('secondpagecontent')) {
		document.getElementById('secondpagecontent').style.display='none';
		document.getElementById('secondpage').className="secondpage";
		
	}
	if (document.getElementById('thirdpagecontent')) {
		document.getElementById('thirdpagecontent').style.display='none';
		document.getElementById('thirdpage').className="thirdpage";
	}
	if (document.getElementById('firstpagecontent')) {
		document.getElementById('firstpagecontent').style.display='block';
		document.getElementById('firstpage').className="firstpage active";
	}
}

function show_secondpage() {
	if (document.getElementById('firstpagecontent')) {
		document.getElementById('firstpagecontent').style.display='none';
		document.getElementById('firstpage').className="firstpage";
	}
	if (document.getElementById('thirdpagecontent')) {
		document.getElementById('thirdpagecontent').style.display='none';
		document.getElementById('thirdpage').className="thirdpage";
	}
	if (document.getElementById('secondpagecontent')) {
		document.getElementById('secondpagecontent').style.display='block';
		document.getElementById('secondpage').className="secondpage active";
	}
}

function show_thirdpage() {
	if (document.getElementById('secondpagecontent')) {
		document.getElementById('secondpagecontent').style.display='none';
		document.getElementById('secondpage').className="secondpage";
	}
	if (document.getElementById('firstpagecontent')) {
		document.getElementById('firstpagecontent').style.display='none';
		document.getElementById('firstpage').className="firstpage";
	}
	if (document.getElementById('thirdpagecontent')) {
		document.getElementById('thirdpagecontent').style.display='block';
		document.getElementById('thirdpage').className="thirdpage active";
	}
}

if (document.getElementById('firstpagecontent')) {
	document.getElementById('firstpagecontent').style.display='block';
	document.getElementById('firstpage').className="firstpage active";
}