function createRequestObject() 
{
    var request;
if(window.XMLHttpRequest)
{
 request = new XMLHttpRequest();


}
else if(window.ActiveXObject)
{
 request = new ActiveXObject("MSXML2.XMLHTTP");
}
    return request;
}
var http = createRequestObject();

function sndReq(url) 
{
	var venue ;	
	venue = document.getElementById('venue').value ;
    http.open('get', url+'&locationID='+venue);
	http.onreadystatechange = handle_dropdown;
    http.send(null);
}

function handle_dropdown() 
{
    if(http.readyState == 4)
	{
        var response = http.responseText;
        document.getElementById('packages').innerHTML = response;
    }
}