function validate(form) {
	var email = form.email.value;
	var password = form.password.value;
    var usertype = 0;

    for(i = 0; i < form.usertype.length; i++)
    {
        if(form.usertype[i].checked == true)
            usertype = form.usertype[i].value;
    }

	if (email == 'E-mail' || email == '') {
		alert('Please enter your E-mail address');
		form.email.value = '';
		form.email.focus();
		return false;
	}
	else if (usertype == 'existing') {
        if (password == '****' || password == '') {
		    alert('Please enter your Password');
		    form.password.value = '';
		    form.password.focus();
		    return false;
        }
	}
	return true;
}

function clearEmail(field) {
	var email = field.value;
	if (email == 'E-mail' || email == '') {
		field.value = '';	
	}
}

function clearPassword(field) {
	var password = field.value;
	if (password == '****' || password == '') {
		field.value = '';	
	}
}