function sublist(selectedValue)
{
	if (selectedValue == "Brain Injury") {
		document.forms['signupform'].servicename.options.length = 0;
		document.forms['signupform'].servicename.disabled = false;
		document.forms['signupform'].servicename.options[0] = new Option('Bristol Road, Birmingham','Bristol Road, Birmingham');
		document.forms['signupform'].servicename.options[1] = new Option('Daniel Yorath House, Leeds','Daniel Yorath House, Leeds');
		document.forms['signupform'].servicename.options[2] = new Option('Fen House, Ely','Fen House, Ely');
		document.forms['signupform'].servicename.options[3] = new Option('Goole Neuro Rehabilitation Centre, Goole','Goole Neuro Rehabilitation Centre, Goole');
		document.forms['signupform'].servicename.options[4] = new Option('Thomas Edward Mitton House, Milton Keynes','Thomas Edward Mitton House, Milton Keynes');
		document.forms['signupform'].servicename.options[5] = new Option('West Heath House, Birmingham','West Heath House, Birmingham');
		document.forms['signupform'].servicename.options[6] = new Option('Kent House, Aylesbury','Kent House, Aylesbury');
		document.forms['signupform'].servicename.options[7] = new Option('Redford Court, Liverpool','Redford Court, Liverpool');
		document.forms['signupform'].servicename.options[8] = new Option('Redford Court Lodge, Liverpool','Redford Court Lodge, Liverpool');
		document.forms['signupform'].servicename.options[9] = new Option('Kerwin Court, Slinfold','Kerwin Court, Slinfold');
		document.forms['signupform'].servicename.options[10] = new Option('Woodmill, Devon','Woodmill, Devon');
		document.forms['signupform'].servicename.options[11] = new Option('York House, York','York House, York');
		document.forms['signupform'].servicename.options[12] = new Option('Community Services (Brain Injury)','Community Services (Brain Injury)');
	} else if (selectedValue == "Autism") {
	
		document.forms['signupform'].servicename.options.length = 0;
		document.forms['signupform'].servicename.disabled = false;
		document.forms['signupform'].servicename.options[0] = new Option('Heathermount Learning Centre, Ascot','Heathermount Learning Centre, Ascot');
		document.forms['signupform'].servicename.options[1] = new Option('Dysons Wood , Reading','Dysons Wood , Reading');
		document.forms['signupform'].servicename.options[2] = new Option('Hollyrood, Lindfield, Sussex','Hollyrood, Lindfield, Sussex');
		document.forms['signupform'].servicename.options[3] = new Option('Holme Oak, Great Bromley, Essex','Holme Oak, Great Bromley, Essex');
		document.forms['signupform'].servicename.options[4] = new Option('Community Services (Autism)','Community Services (Autism)');
	} else if (selectedValue == "Physical Disability") {
	
		document.forms['signupform'].servicename.options.length = 0;
		document.forms['signupform'].servicename.disabled = false;
		document.forms['signupform'].servicename.options[0] = new Option('Ernest Kleinwort Court, Burgess Hill','Ernest Kleinwort Court, Burgess Hill');
		document.forms['signupform'].servicename.options[1] = new Option('Shinewater Court, Eastbourne','Shinewater Court, Eastbourne');
		document.forms['signupform'].servicename.options[2] = new Option('Terry Yorath House, Leeds','Terry Yorath House, Leeds');
		document.forms['signupform'].servicename.options[3] = new Option('Victoria House, Hull','Victoria House, Hull');
		document.forms['signupform'].servicename.options[4] = new Option('Jane Percy House, Cramlington','Jane Percy House, Cramlington');
		document.forms['signupform'].servicename.options[5] = new Option('Carlton Resource Centre, Barnsley','Carlton Resource Centre, Barnsley');
		document.forms['signupform'].servicename.options[6] = new Option('Community Services (Physical Disability)','Community Services (Physical Disability)');
	} else if (selectedValue == "DT/BIRT Staff") {
		document.forms['signupform'].servicename.options.length = 0;
		document.forms['signupform'].servicename.disabled = false;
		document.forms['signupform'].servicename.options[0] = new Option('N/A','N/A');
	} else {
		document.forms['signupform'].servicename.options.length = 0;
		document.forms['signupform'].servicename.options[0] = new Option('Select a service type','');
		document.forms['signupform'].servicename.disabled = true;
	}
}


function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    }
	
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

function checkSignup() {
	if (document.signupform.firstname.value == '' || document.signupform.surname.value == '' || document.signupform.tel.value == '' || document.signupform.email.value == '' || document.signupform.password.value == '' || document.signupform.servicetype.options[document.signupform.servicetype.selectedIndex].value == '' || document.signupform.servicename.options[document.signupform.servicename.selectedIndex].value == '') {
		alert("Please fill in all the fields.");
		return false;
	}else if(! isValidEmail(document.signupform.email.value)) {
        alert("Please enter a valid email address");
        return false;
	}else if(document.signupform.password.value != document.signupform.passwordrepeat.value) {
        alert("Your repeated password does not match your password");
        return false;
    }else{
		return true;
	}
}