combobox visible depending on the selection in a previous combobox

i've 5 combo box

 

please me find way resolve problem :

want when select in first combobox, second 1 becomes visible , first 1 becomes invisible, , when select in second one, third 1 becomes visible , second invisible ...........etc

 

the code :

 

1st combobox :

 

search_motif.prompt = "select motif";

var xmlloader:urlloader = new urlloader();

var xmldata:xml = new xml();

var xmlary:array = new array();

xmlloader.addeventlistener(event.complete, loadxml);

xmlloader.load(new urlrequest("motif.xml"));

function loadxml(e:event):void {

    xmldata = new xml(e.target.data);

    trace(xmldata..motifname.length());

    for(var i:uint=0;i<xmldata..motifname.length();i++)

    {

        xmlary.push(xmldata..motifname[i]);

        search_motif.additem( { label: xmlary[i], data:xmlary[i] } );

     

    }

}

 

2nd combobox :

 

 

 

search_age.prompt = "select age";

var xml2loader:urlloader = new urlloader();

var xml2data:xml = new xml();

var xml2ary:array = new array();

xml2loader.addeventlistener(event.complete, loadxml2);

xml2loader.load(new urlrequest("age.xml"));

       

function loadxml2(e:event):void {

    xml2data = new xml(e.target.data);

    trace(xml2data..agename.length());

    for(var j:uint=0;j<xml2data..agename.length();j++)    {

       

       

        xml2ary.push(xml2data..agename[j]);

        search_motif.additem( { label: xmlary[j], data:xmlary[j] } );

 

   

    }

}

 

and 3rd combobox, 4th combobox .....................

use change event trigger combobox'es visible property.

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