function superbob_swap(imagename) {
	switcher = document.getElementById('superbob');
	memForm = document.getElementById('membership_form');
	switcher.src = 'images/' + imagename;
	memForm.style.display = 'none';
	switcher.style.display = 'block';
	
	// Info link
        if(imagename == 'back_about.gif') {
                document.getElementById('superbob2').href = "";
        }

	// Doors Link
        if(imagename == 'back_music.gif') {
                document.getElementById('superbob2').href = "";
        }

	 // Facebook link
        if(imagename == 'back_membership.gif') {
								switcher.style.display = 'none';
								memForm.style.display = 'block';
        }

	// Forthcoming link
        if(imagename == 'back_djs.gif') {
                document.getElementById('superbob2').href = "";
        }

	// Location link
        if(imagename == 'back_jobs.gif') {
                document.getElementById('superbob2').href = "";
        }

	 // Fortcoming link
        if(imagename == 'back_contact.gif') {
                document.getElementById('superbob2').href = "";
        }
}

function superbob_man(imagename) {
	switcher = document.getElementById('superbob');
	switcher.style.display = 'block';
	memForm.style.display = 'none';
	switcher.src = 'images/' + imagename;
}

var arrPics = [
	"images/blah.jpg"
	,"images/blah2.jpg"

];

function pl(n)
{
	if (!document.ic_i)
		document.ic_i = new Array();
	var e = document.ic_i[document.ic_i.length-1] = new Image;
	e.src = n;
}

var i = 0;
for(i=0; i<=5; i++) {
	pl(arrPics[i]);
}

function hider() { 
	document.getElementById('superbob').visibility = 'hidden';
}

function memberSubmit() {
	var name = document.getElementById('membership_name').value;
	var email = document.getElementById('membership_email').value;
	var city = document.getElementById('membership_city').value;
	var mobile = document.getElementById('membership_mobile').value;
	if(!name.length) {
		alert("Please enter your name.");
	}
	else if(!echeck(email)) {
		alert("Please enter a valid email address.");
	}
	else {
		ajaxSubmit(name, email, mobile, city);
	}
	return false;
}

function ajaxSubmit(name, email, mobile, city)
{
var xmlHttp;
try
	{
	// Firefox, Opera 8.0+, Safari
	xmlHttp=new XMLHttpRequest();
	}
catch (e)
	{
	// Internet Explorer
	try
	{
	xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch (e)
	{
	try
		{
		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	catch (e)
		{
		alert("Your browser does not support AJAX!");
		return false;
		}
	}
	}
	xmlHttp.onreadystatechange=function()
	{
	if(xmlHttp.readyState==4)
		{
		if(xmlHttp.responseText == "success") {
			superbob_swap('back_membership_thanks.gif');
			document.getElementById('membership_name').value = "";
			document.getElementById('membership_email').value = "";
		}
		else if(xmlHttp.responseText == "db_fail") {
			alert("Error connecting to database.  Please try again later.");
		}
		else {
			alert("An error occurred.  Please try again later.");
		}
		}
	}
	xmlHttp.open("GET","insertdisco.php?name=" + name +  "&email=" + email + "&mobile=" + mobile + "&city=" + city, true);
	xmlHttp.send(null);
	
}

function echeck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
		 return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		 return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
			return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
			return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
			return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
			return false
	 }
	
	 if (str.indexOf(" ")!=-1){
			return false
	 }
	 return true					
}