var sm = new Array();
var smli = new Array();

function start() {
    sm['series'] = document.getElementById('sm_series');
    sm['areas']  = document.getElementById('sm_areas');
    
    if (sm['series']) smli['series'] = sm_series.parentNode;
    if (sm['areas'])  smli['areas']  = sm_areas.parentNode;

    smli['series'].onmouseover = function() {sm['series'].className = '';};
    smli['areas'].onmouseover  = function() {sm['areas'].className = '';};
    smli['series'].onmouseout  = function() {sm['series'].className = 'hidden'};
    smli['areas'].onmouseout   = function() {sm['areas'].className = 'hidden'};
}