function add_smile(text) {
   $('syscontent').innerHTML += "::icon_" + text + "::";
}
function trim (str) {
   str = str.replace(/^\s+/, '');
   for (var i = str.length - 1; i > 0; i--) {
      if (/\S/.test(str.charAt(i))) {
         str = str.substring(0, i + 1);
         break;
      }
   }
   return str;
}