function insertSortedLb(sVal) {
 var lb = document.getElementById('mylist');
 
 oOption = document.createElement("OPTION");
 oOption.text = '';
 oOption.value = '';
 oOption.selected = false;
 lb.options[lb.length] = oOption;
 
 for(i=lb.length-1; i>0; i--)  {
   if (lb.options[i-1].text < sVal) {
     oOption = document.createElement("OPTION");
     oOption.text = sVal;
     oOption.value = sVal;
     oOption.selected = false;
     lb.options[i] = oOption;
     break;
   }
   else {
     lb.options[i].text = lb.options[i-1].text;
     lb.options[i].value = lb.options[i-1].value;
   }
 } // for
} // end of insertSortedLb()