function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
  var ca = document.cookie.split(';');
  var nameEQ = name + "=";
  for(var i=0; i < ca.length; i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1, c.length); //delete spaces
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
  return null;
}

function eraseCookie(name)
{
  createCookie(name, "", -1);
}

function showmain(name) {
	createCookie('visibility',"visible",1);
	document.getElementById(name).style.display = "block";
}

function hidemain(name) {
	createCookie('visibility',"hidden",1);
	document.getElementById(name).style.display = "none";
}	

function show(name) {
	document.getElementById(name).style.display = "block";
}

function hide(name) {
	document.getElementById(name).style.display = "none";
}	

function showhide(name1, name2) {
	if (document.getElementById(name1).style.display=="none") {
		document.getElementById(name1).style.display = "block";
		document.getElementById('show').style.display = "block";
		document.getElementById(name2).style.display = "none";
	}
	else {
		document.getElementById(name1).style.display = "none";
		document.getElementById('show').style.display = "none";
		document.getElementById(name2).style.display = "block";
	}
}