function sortList()
{
var lb = document.getElementById('operator_world');
arrTexts = new Array();
arrValues = new Array();
arrOldTexts = new Array();

for(i=0; i<lb.length; i++)
{
arrTexts[i] = lb.options[i].text;
arrValues[i] = lb.options[i].value;

arrOldTexts[i] = lb.options[i].text;
}

arrTexts.sort();

for(i=0; i<lb.length; i++)
{
lb.options[i].text = arrTexts[i];
for(j=0; j<lb.length; j++)
{
if (arrTexts[i] == arrOldTexts[j])
{
lb.options[i].value = arrValues[j];
j = lb.length;
}
}
}
var elOptNew = document.createElement('option');
elOptNew.text="OPERATOR NOT IN LIST";
elOptNew.value="2000";
 try {
    lb.add(elOptNew, null);
  }
  catch(ex) {
    lb.add(elOptNew);
  }

}