function createRequestObject() {
        var req;
        if(window.XMLHttpRequest){
          req = new XMLHttpRequest();
        } else if(window.ActiveXObject) {
          req = new ActiveXObject("Microsoft.XMLHTTP");
        } else {
          alert('Your browser does not support AJAX.');
        }

        return req;
}//end createRequestObject

function airCodes(theForm,seemore) {
httpGet=createRequestObject();
if (httpGet==null) {
        alert ("Your browser does not support AJAX!");
        return;
}

var thefile = "airport.php";
var parameters = "?";
if(seemore == "NA"){
	var searchstring = theForm.q.value;
	parameters += "q="+searchstring;
}
else{
	parameters += "seemore="+seemore;
}
var tdate = new Date();
var etime = tdate.getTime();
parameters += '&et='+etime;
//alert(parameters);
thefile = thefile+parameters;
httpGet.open("GET",thefile,true);
httpGet.onreadystatechange=handleResults;
httpGet.send(null);
}//end airCodes

function handleResults(){

if(httpGet.readyState == 4){
    if(httpGet.status == 200){
        var response = httpGet.responseText;
        if(response){
		popup(response);
                //document.getElementById('searchresults').innerHTML = response;
        }
    }
    else{alert('Error Received: '+httpGet.status+'\nThere was a problem processing your request.  Please try again.');}
}
}//end handleResults