function imgLanguage_Click(strChangeTo) {
  var strQuery = location.search;
  var strLanguage;
  var numPosStart = 0, numPosEnd = 0;
      
  if (strChangeTo.length > 0) {

    strLanguage = strChangeTo;

    numPosStart = strQuery.indexOf("language=") + "language=".length;

    if (numPosStart > 8) {

      for (var i = numPosStart; i < strQuery.length; i++)
        if (strQuery.charAt(i) == "&") {
          numPosEnd = i;
          break;
        }
      
      if (numPosEnd == 0)
        numPosEnd = strQuery.length;
      
    }
    else
      strLanguage = "?language=" + strLanguage;

    location.href = strQuery.substring(0, numPosStart) + strLanguage + strQuery.substring(numPosEnd, strQuery.length);
  }
}