//fetch error messages
function getMessages(msg_code_string)
{
    jQuery.post(root_path+"ajax-php/ajax-load-messages.php",{param_string: msg_code_string },function(data){
        data = data.split("^^^^");
        message_code_array = msg_code_string.split("~");
        array_length = message_code_array.length;
        msg = new Array();
        for(var x = 0; x < array_length; x++)
        {
          msg[message_code_array[x]] = data[x];
        }
    });
}