function check_info() {

    var name = document.getElementById("name").value;
    var email = document.getElementById("email").value;
    
	if(document.getElementById("message") != null)
		var message = document.getElementById("message").value;
	else
		var message = "NULL";
    
	var at = "@";
    var dot = ".";
    var lat = email.indexOf(at);
    var lstr = email.length;
    var ldot = email.indexOf(dot);

    var check = true;

    if(name == "" || email == "" || message == "")
        check = false;
    if (email.indexOf(at) == -1) 
        check = false;
    if (email.indexOf(at) == -1 || email.indexOf(at) == 0 || email.indexOf(at) == lstr)
        check = false;
    if (email.indexOf(dot) == -1 || email.indexOf(dot) == 0 || email.indexOf(dot) == lstr)
        check = false;
    if (email.indexOf(at, (lat + 1)) != -1)
        check = false;
    if (email.substring(lat - 1, lat) == dot || email.substring(lat + 1, lat + 2) == dot)
        check = false;
    if (email.indexOf(dot, (lat + 2)) == -1)
        check = false;
    if (email.indexOf(" ") != -1)
        check = false;
    
    if((! check) && message == "NULL")
        alert("Bitte gib Deinen Namen und eine valide e-Mail-Adresse an!");
    if((! check) && message != "NULL")
	    alert("Bitte gib Deinen Namen, eine valide e-Mail-Adresse und eine Nachricht an!");
		
	if(check && message == "NULL")
		alert("Vielen Dank - Du wirst jetzt in unseren Newsletter eingetragen!");
	if(check && message != "NULL")
		alert("Vielen Dank - Deine Nachricht wird jetzt gesendet!");
		
    return check;
}

function check_info_register() {
    var vname = document.getElementById("vname").value;
    var nname = document.getElementById("nname").value;	
    var email = document.getElementById("mail").value;
	
	var at = "@";
    var dot = ".";
    var lat = email.indexOf(at);
    var lstr = email.length;
    var ldot = email.indexOf(dot);

    var check = true;
	
    if(vname == "" || nname == "" || email == "")
        check = false;
    if (email.indexOf(at) == -1) 
        check = false;
	if (email.indexOf(at) == -1 || email.indexOf(at) == 0 || email.indexOf(at) == lstr)
        check = false;
    if (email.indexOf(dot) == -1 || email.indexOf(dot) == 0 || email.indexOf(dot) == lstr)
        check = false;
    if (email.indexOf(at, (lat + 1)) != -1)
        check = false;
    if (email.substring(lat - 1, lat) == dot || email.substring(lat + 1, lat + 2) == dot)
        check = false;
    if (email.indexOf(dot, (lat + 2)) == -1)
        check = false;
    if (email.indexOf(" ") != -1)
        check = false;
    
    if((! check))
        alert("Bitte gib Deinen Namen und eine valide e-Mail-Adresse an!");

	return check;
}

function check_bands() {
	var bandname = document.getElementById("bandname").value;
	var description = document.getElementById("description").value;
	var website = document.getElementById("website").value;
	var contact = document.getElementById("contact").value;
	var email = document.getElementById("email").value;
	
	var at = "@";
    var dot = ".";
    var lat = email.indexOf(at);
    var lstr = email.length;
    var ldot = email.indexOf(dot);
	
	var check = true;
	
	if(bandname == "" || description == "" || website == "" || website == "http://" || contact == "" || email == "")
		check = false;
	
	 if (email.indexOf(at) == -1) 
        check = false;
    if (email.indexOf(at) == -1 || email.indexOf(at) == 0 || email.indexOf(at) == lstr)
        check = false;
    if (email.indexOf(dot) == -1 || email.indexOf(dot) == 0 || email.indexOf(dot) == lstr)
        check = false;
    if (email.indexOf(at, (lat + 1)) != -1)
        check = false;
    if (email.substring(lat - 1, lat) == dot || email.substring(lat + 1, lat + 2) == dot)
        check = false;
    if (email.indexOf(dot, (lat + 2)) == -1)
        check = false;
    if (email.indexOf(" ") != -1)
        check = false;

	if(! check)
		alert("Bitte gib alle Informationen korrekt an!");
	else
		alert("Vielen Dank - Ihr werdet jetzt registriert!")
		
	return check;
}