//Provides suggestions for the search box from the GSA suggest service.
function RemoteSuggestions(baseurl) {
    this.baseurl=baseurl;
    if (typeof XMLHttpRequest != "undefined") {
        this.http = new XMLHttpRequest();
    } else if (typeof ActiveXObject != "undefined") {
        this.http = new ActiveXObject("MSXML2.XmlHttp");
    } else {
        //alert("No XMLHttpRequest object available. This functionality will not work.");
    }
}

/**
 * Request suggestions for the given autosuggest control. 
 * @param oAutoSuggestControl The autosuggest control to provide suggestions for.
 */
RemoteSuggestions.prototype.requestSuggestions = function (oAutoSuggestControl /*:AutoSuggestControl*/,
                                                          bTypeAhead /*:boolean*/) {

    var oHttp = this.http;
                                                             
    //if there is already a live request, cancel it
    if (oHttp.readyState != 0) {
        oHttp.abort();
    }                 
    
    //build the URL
    var sURL = this.baseurl+"?q=" + encodeURIComponent(oAutoSuggestControl.textbox.value);
    
    oHttp.open("get", sURL , true);
    oHttp.onreadystatechange = function () {
        if (oHttp.readyState == 4) {
            //evaluate the returned text JavaScript (an array)
            var aSuggestions = eval(oHttp.responseText);
        
            //provide suggestions to the control
            oAutoSuggestControl.autosuggest(aSuggestions, bTypeAhead);        
        }    
    };
    oHttp.send(null);
};