Вставка bb-кодов вокруг выделенного текста

<script>
 
function x () {return;}
function FocusText() {
    document.forma.text.focus();
    document.forma.text.select();
    return true; 
    }
function DoSmilie(addSmilie) {
    var revisedmsgage;
    var currentmsgage = document.forma.text.value;
    revisedmsgage = currentmsgage + addSmilie;
    document.forma.text.value = revisedmsgage;
    document.forma.text.focus();
    return;
}
function DoPrompt(action) { 
  var revisedmsgage; 
  var currentmsgage = document.forma.qmsgage.value; 
}
 
 
</script>
 
 
<a href = "javascript:%20x()" onclick = "DoSmilie('[D1] [/D1]');"><img src = "smile/1.gif" /></a>
<a href = "javascript:%20x()" onclick = "DoSmilie('[D2] [/D2]');"><img src = "smile/2.gif" /></a>
<a href = "javascript:%20x()" onclick = "DoSmilie('[D3] [/D3]');"><img src = "smile/3.gif" /></a>
<a href = "javascript:%20x()" onclick = "DoSmilie('[D4] [/D4]');"><img src = "smile/4.gif" /></a>
<a href = "javascript:%20x()" onclick = "DoSmilie('[b][/b]');">[B]</a>
<a href = "javascript:%20x()" onclick = "DoSmilie('[img][/img]');">[IMG]</a>
<a href = "javascript:%20x()" onclick = "DoSmilie('[url=][/url]');">[URL]</a>