function escapeUnicode(string) 
{
  var str = string;
  var reg = new RegExp("([\u0080-\uffff])", "");
  var i=0;
  var arr;
  while ((arr = reg.exec(str)) != null) {
    i++;
    if(i>100000) break;
    if(arr.index >= 0) {
      str = str.substring(0, arr.index) +
      "%u" + getHex(RegExp.$1.charCodeAt(0), 4) + str.substring(arr.index+1);
    }
    else {
      break;
    }
  }
  return str;
}

function getHex(charCode, lenMin) 
{
  var result = charCode.toString(16);
  while(result.length<lenMin) {
    result = "0" + result;
  }
  return result;
}