function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
function clearField(field){
 	if (field.value == field.defaultValue) { field.value = ""; } 
}
function checkField(field){
 	if (field.value == "") { field.value = field.defaultValue; } 
}

function xorCodes(s, key){
  var res = "";
  for (var i=0; i<s.length; i++){
       res += String.fromCharCode(
              s.charCodeAt(i) ^ key 
              );
    }
  return res
  }