var tipBaseUrl = "";
function setQueryString(querystring)
{
  var urlWithoutQuerystring = window.location.toString();
  if (urlWithoutQuerystring.indexOf("?") != -1)
    urlWithoutQuerystring = urlWithoutQuerystring.substring(0, urlWithoutQuerystring.indexOf("?"));
  $("#facebookLink").attr("href", "http://www.facebook.com/sharer.php?u=" + urlWithoutQuerystring + "?" + querystring);
  $("#twitterLink").attr("href", "http://twitter.com/home?status=" + urlWithoutQuerystring + "?" + querystring);
  
  var encodedQstring = querystring;
  while (encodedQstring.indexOf("&") != -1) {
    encodedQstring = encodedQstring.replace("&", "%26");
  }

  $("#tipLink").attr("href", tipBaseUrl + "%26" + encodedQstring);

  $("#directUrl").val(urlWithoutQuerystring + "?" + querystring);
}