function In(Zeichen) {
  var input = document.forms['search'].elements['word'];
  input.focus();
  if(typeof document.selection != 'undefined') {
    var range = document.selection.createRange();
    var insText = range.text;
    range.text = Zeichen;
    range = document.selection.createRange();
    if (insText.length == 0) {
      range.move('character', -input.length);
    } else {
      range.moveStart('character', Zeichen.length + insText.length);      
    }
    range.select();
  }
  else if(typeof input.selectionStart != 'undefined')
  {
    var start = input.selectionStart;
    var insText = input.value.substring(start);
    input.value = input.value.substr(0, start) + Zeichen + insText;
    var pos;
    if (insText.length == 0) {
      pos = start + Zeichen.length;
    } else {
      pos = start + Zeichen.length;
    }
    input.selectionStart = pos;
  }
  else
  {
    var pos;
    var re = new RegExp('^[0-9]{0,3}$');
    while(!re.test(pos)) {
      pos = input.value.length;
    }
    if(pos > input.value.length) {
      pos = input.value.length;
    }
    input.value = input.value.substr(0, pos) + Zeichen + input.value.substr(pos);
  }
}
function back()
 {
   var text = window.document.search.word.value;
   window.document.search.word.value = text.substr(0, (text.length - 1));
 }