function getParameter( name ) {
    var url = window.location.href;
    var paramsStart = url.indexOf("?");

    if(paramsStart == -1)
        return "";

    var paramString = url.substr(paramsStart + 1);
    var tokenStart = paramString.indexOf(name);
    if(tokenStart != -1){
     paramToEnd = paramString.substr(tokenStart + name.length + 1);
     var delimiterPos = paramToEnd.indexOf("&");

     if(delimiterPos == -1)
        return paramToEnd;
     else return paramToEnd.substr(0, delimiterPos);

    } else return "";
}