function page1() {
	document.getElementById("page1").style.display = "block";
	document.getElementById("page2").style.display = "none";
	document.getElementById("page3").style.display = "none";
}
function page2() {
	document.getElementById("page1").style.display = "none";
	document.getElementById("page2").style.display = "block";
	document.getElementById("page3").style.display = "none";
}
function page3() {
	document.getElementById("page1").style.display = "none";
	document.getElementById("page2").style.display = "none";
	document.getElementById("page3").style.display = "block";
}