function asynPopulateDropdownsQuickSearch()
{

    var queryString;
    queryString = '&';
    
    if (document.forms['quicksearch'].elements['sc_River'].value != '')
    {
     	queryString += 'sc_River=' + document.forms['quicksearch'].elements['sc_River'].value + '&';
    }
   
    
    
  
    makeQuickSearchRequest('/ajax-advancedsearch-response.aspx?transformxslt=QuickSearchTransform.xsl' + queryString);
}




function makeQuickSearchRequest(url) {
       
       document.getElementById('quicksearch_dropdowns').innerHTML = '<div class="loading"><img id="loading" src="images/loadingAnimation.gif"/><h3>Please wait</h3></div>';

       var httpRequest;

        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
                } 
                catch (e) {
                           try {
                                httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                               } 
                             catch (e) {}
                          }
                                       }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        httpRequest.onreadystatechange = function() { alertContentsQuickSearch(httpRequest); };
        httpRequest.open('GET', url, true);
        httpRequest.send(null);

    }

    function alertContentsQuickSearch(httpRequest) {

        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {

	     document.getElementById('quicksearch_dropdowns').innerHTML = httpRequest.responseText;


            } else {
                alert('There was a problem with the request.');
            }
        }

    }