function getMarkets() {

    var url = "index.php";
    var par2 = document.getElementById('areas_select').value;
    var pars = "eID=tx_wwcat_pi1&par2="+par2;

    var myAjax = new Ajax.Request(url, {method: 'get', parameters: pars, onComplete: updateMarkets});
}
 
 
function updateMarkets(orgRequest) {
    var xmldoc = orgRequest.responseXML;
    var result = xmldoc.getElementsByTagName('data')[0].firstChild.data;
  
  
    if(document.getElementById('areas_select').value!=0)document.getElementById('market_div').innerHTML = result;
    else document.getElementById('market_div').innerHTML = document.getElementById('market_div_orig').innerHTML;
}