var state = 'none'; 

function showhide(divid) { 

if (state == 'block') { 
state = 'none'; 
} 
else { 
state = 'block'; 
} 
if (document.all) { //IS IE 4 or 5 (or 6 beta) 
eval( "document.all." + divid + ".style.display = state"); 
} 
if (document.layers) { //IS NETSCAPE 4 or below 
document.layers[divid].display = state; 
} 
if (document.getElementById &&!document.all) { 
hza = document.getElementById(divid); 
hza.style.display = state; 
} 
} 


function setVis(id, visibility) {
document.getElementById(id).style.display = visibility;
}

function ee(name, domain, suffix, text)
{
   var address = name + "\u0040" + domain + "." + suffix;
   var url = "mai" + "lto:" + address;

   if( ! text )
   {
      text = address;
   }

   document.write("<a href=\"" + url + "\">" + text + "</a>");
}

function el(name, domain, suffix, url)
{
	var visaddress = name + "\u0040" + domain + "." + suffix;
	var url = "http://www.justtheflight.co.uk/" + url;
	document.write("<a href=\"" + url + "\">" + visaddress + "</a>");
}

function validate_signup(frm) {
	var isError = false;
	var emailAddress = document.getElementById("Email").value;
	
	if (emailAddress == '' || emailAddress.indexOf('@') == -1) {
		alert('Please enter your email address');
		isError = true;
	}

	return !isError;
}