function validateContact() {
    var error = "";
    if(document.getElementById('name').value == "") {
        error = error + "   => Name\n";
    }
        if(document.getElementById('address').value == "") {
        error = error + "   => Address\n";
    }
		if(document.getElementById('tel').value == "") {
        error = error + "   => Telephone Number\n";
    }
   		if(document.getElementById('email').value == "") {
        error = error + "   => Email Address\n";
    }
   
    if(error != "") {
        alert('The following required fields can not be left blank:\n\n' + error);
        return false;
    } else {
        return true;
    }
       
}