// Session Handling
function get_session_var(session_var_name)
{
	var ajax_url = '/includes/ajax_data_servers/sessionreturn.xml.php?action=get&name=' + URLEncode(session_var_name);
	
	get_ajax(ajax_url, 'GET', false);
		
	return get_xml_field('sessionvalue', 0);
}


function write_session_var(session_var_name, session_var_value)
{
	var ajax_url = '/includes/ajax_data_servers/sessionreturn.xml.php?action=add&name=' + URLEncode(session_var_name) + '&value=' + URLEncode(session_var_value);
	get_ajax(ajax_url, 'GET', false);
	
	return true;
}

function remove_session_var(session_var_name)
{
	var ajax_url = '/includes/ajax_data_servers/sessionreturn.xml.php?action=remove&name=' + URLEncode(session_var_name);
	get_ajax(ajax_url, 'GET', false);
	
	return true;
}