function show1(){
	content1.style.display="block";
	content2.style.display="none";
	content3.style.display="none";
	content4.style.display="none";
	button1.style.display="none";
	button2.style.display="block";
	button3.style.display="block";
	button4.style.display="block";
	button1on.style.display="block";
	button2on.style.display="none";
	button3on.style.display="none";
	button4on.style.display="none";
}

function show2(){
	content1.style.display="none";
	content2.style.display="block";
	content3.style.display="none";
	content4.style.display="none";
	button1.style.display="block";
	button2.style.display="none";
	button3.style.display="block";
	button4.style.display="block";
	button1on.style.display="none";
	button2on.style.display="block";
	button3on.style.display="none";
	button4on.style.display="none";
}

function show3(){
	content1.style.display="none";
	content2.style.display="none";
	content3.style.display="block";
	content4.style.display="none";
	button1.style.display="block";
	button2.style.display="block";
	button3.style.display="none";
	button4.style.display="block";
	button1on.style.display="none";
	button2on.style.display="none";
	button3on.style.display="block";
	button4on.style.display="none";
}
function show4(){
	content1.style.display="none";
	content2.style.display="none";
	content3.style.display="none";
	content4.style.display="block";
	button1.style.display="block";
	button2.style.display="block";
	button3.style.display="block";
	button4.style.display="none";
	button1on.style.display="none";
	button2on.style.display="none";
	button3on.style.display="none";
	button4on.style.display="block";
}