/**
 * Provides suggestions for state names (USA).
 * @class
 * @scope public
 */
function RemoteStateSuggestions() {
	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. 
 * @scope protected
 * @param oAutoSuggestControl The autosuggest control to provide suggestions for.
 */
RemoteStateSuggestions.prototype.requestSuggestions = function (oAutoSuggestControl, bTypeAhead) {
	var oHttp = this.http;
									 
	//if there is already a live request, cancel it
	if (oHttp.readyState != 0) {
		oHttp.abort();
	}                 
	
	//build the URL
	var sURL = "autosuggest/suggestions.php?catalog=1&userInput=" + encodeURIComponent(oAutoSuggestControl.textbox.value);
	
	//open connection to states.txt file
	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);
};