function Browser() { var ua, s, i; this.isIE = false; this.isOP = false; this.isNS = false; this.version = null; ua = navigator.userAgent; s = "Opera"; if ((i = ua.indexOf(s)) >= 0) { this.isOP = true; this.version = parseFloat(ua.substr(i + s.length)); return; } s = "Netscape6/"; if ((i = ua.indexOf(s)) >= 0) { this.isNS = true; this.version = parseFloat(ua.substr(i + s.length)); return; } s = "Gecko"; if ((i = ua.indexOf(s)) >= 0) { this.isNS = true; this.version = 6.1; return; } s = "MSIE"; if ((i = ua.indexOf(s))) { this.isIE = true; this.version = parseFloat(ua.substr(i + s.length)); return; } }

function onSilverlightError(sender, args) {
    var appSource = "";
    var errorType = args.ErrorType;
    var iErrorCode = args.ErrorCode;
    var errMsg = "Unhandled Error in Silverlight 2 Application " + appSource + "\n";

    if (sender != null && sender != 0) { appSource = sender.getHost().Source; }
    
    errMsg += "Code: " + iErrorCode + "    \n";
    errMsg += "Category: " + errorType + "       \n";
    errMsg += "Message: " + args.ErrorMessage + "     \n";
    
    if (errorType == "ParserError") {
        errMsg += "File: " + args.xamlFile + "     \n";
        errMsg += "Line: " + args.lineNumber + "     \n";
        errMsg += "Position: " + args.charPosition + "     \n";
    } else if (errorType == "RuntimeError") {
        if (args.lineNumber != 0) {
            errMsg += "Line: " + args.lineNumber + "     \n";
            errMsg += "Position: " + args.charPosition + "     \n";
        }
        errMsg += "MethodName: " + args.methodName + "     \n";
    }
    
    throw new Error(errMsg);
}

/*
url-loading object and a request queue built on top of it
*/

/* namespacing object */
var net = new Object();

net.READY_STATE_UNINITIALIZED = 0;
net.READY_STATE_LOADING = 1;
net.READY_STATE_LOADED = 2;
net.READY_STATE_INTERACTIVE = 3;
net.READY_STATE_COMPLETE = 4;


/*--- content loader object for cross-browser requests ---*/
net.ContentLoader = function(url, onload, onerror, method, params, contentType) {
    this.req = null;
    net.currentLoader = this;
    this.onload = onload;
    this.onerror = (onerror) ? onerror : this.defaultError;
    this.loadXMLDoc(url, method, params, contentType);
}

net.ContentLoader.prototype.loadXMLDoc = function(url, method, params, contentType) {
    if (!method) {
        method = "GET";
    }
    if (!contentType && method == "POST") {
        contentType = 'application/x-www-form-urlencoded';
    }
    if (window.XMLHttpRequest) {
        this.req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        this.req = new ActiveXObject("Microsoft.XMLHTTP");
    }
    if (this.req) {
        try {
            var loader = this;
            this.req.onreadystatechange = function() {
                net.ContentLoader.onReadyState.call(loader);
            }
            this.req.open(method, url, true);
            if (contentType) {
                this.req.setRequestHeader('Content-Type', contentType);
            }

            this.req.send(params);
        } catch (err) {
            this.onerror.call(this);
        }
    }

}


net.ContentLoader.onReadyState = function() {
    var req = this.req;
    var ready = req.readyState;
    try {
        var httpStatus = req.status;
        if (ready == net.READY_STATE_COMPLETE) {
            if (httpStatus == 200 || httpStatus == 0) {
                this.onload.call(this);
            } else {
                this.onerror.call(this);
            }
        }
    }
    catch (e) { }
}

net.ContentLoader.prototype.defaultError = function() {
    alert("error fetching data!"
    + "\n\nreadyState:" + this.req.readyState
    + "\nstatus: " + this.req.status
    + "\nheaders: " + this.req.getAllResponseHeaders());
}