// JavaScript Document
function Visibility(){
		var id1 = 'c2';
		var id2 = 'c1';
		var id3 = 'c4';
		var id4 = 'c3';
		document.getElementById(id1).style.visibility = "hidden";
		document.getElementById(id1).style.display = "none";
		document.getElementById(id2).style.visibility = "visible";
		document.getElementById(id2).style.display = "block";
		document.getElementById(id3).style.visibility = "hidden";
		document.getElementById(id3).style.display = "none";
		document.getElementById(id4).style.visibility = "visible";
		document.getElementById(id4).style.display = "block";
}

function Visibility1(){
		var id1 = 'c1';
		var id2 = 'c2';
		document.getElementById(id1).style.visibility = "hidden";
		document.getElementById(id1).style.display = "none";
		document.getElementById(id2).style.visibility = "visible";
		document.getElementById(id2).style.display = "block";
}
function Visibility2(){
		var id1 = 'c2';
		var id2 = 'c1';
		document.getElementById(id1).style.visibility = "hidden";
		document.getElementById(id1).style.display = "none";
		document.getElementById(id2).style.visibility = "visible";
		document.getElementById(id2).style.display = "block";
}
function Visibility3(){
		var id1 = 'c3';
		var id2 = 'c4';
		document.getElementById(id1).style.visibility = "hidden";
		document.getElementById(id1).style.display = "none";
		document.getElementById(id2).style.visibility = "visible";
		document.getElementById(id2).style.display = "block";
}
function Visibility4(){
		var id1 = 'c4';
		var id2 = 'c3';
		document.getElementById(id1).style.visibility = "hidden";
		document.getElementById(id1).style.display = "none";
		document.getElementById(id2).style.visibility = "visible";
		document.getElementById(id2).style.display = "block";
}