function getHTTPObject(){
   if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP");
   else if (window.XMLHttpRequest) return new XMLHttpRequest();
   else {
      alert("Your browser does not support AJAX.");
      return null;
   }
}  

function doWork(){    
    httpObject = getHTTPObject();
    if (httpObject != null) {
        httpObject.open("GET", "getcc.asp?manufacturer="+document.getElementById('manufacturer').value, true);
        httpObject.onreadystatechange = setOutput;
        httpObject.send(null);
    }
}

function setOutput(){
    if(httpObject.readyState == 4){
        var combo = document.getElementById('cc');
        combo.options.length = 0;
 
        var response = httpObject.responseText;
        var items = response.split(";");
        var count = items.length;
        combo.options[0] = new Option("Please Select","");
        combo.options[1] = new Option("","");
        for (var i=0;i<count;i++){
 //           var options = items[i].split("|");
            combo.options[i+2] = new Option(items[i],items[i]);
        }
    }
}