Comments by onur_odemis (Top 1 by date)

Or try this

function getText(slction, textDiv) {
txtSelected = slction.selectedIndex;
document.getElementById(textDiv).innerHTML = DivTxt[txtSelected];
}

<select class="body_text" name="critical" onchange="getText(this, 'textDiv')" style="height:30px;">
  <option value="Select"> Select </option>
    <option value="North Pole"> North Pole </option>
    <option value="South Pole"> South Pole </option>    
  </select>