Hi Savio,

In case of not IE-browsers, the object can be inserted at caret, but not text-string. However, the text node ("#text") does not support html tags, so, string like " " will be inserted explicitly. It is possible to create a SPAN and set its innerHTML to that value, but in case of webkit (Chrome/Safari) the browser may insert further content typed-in by end user inside of that SPAN rather than outside (Firefox is ok).
So, basically application is limited to a single explicit space-character.

Below are codes for you:

function WebHtmlEditor1_KeyDown(oEditor, keyCode, oEvent)
{
 if(keyCode == 9)
 {
  var tab = '  ';
  if(!oEditor._ie)
  {
   tab = document.createTextNode(' ');
   //var span = document.createElement('SPAN');
   //span.innerHTML = tab;
   //tab = span;
  }
  oEditor.insertAtCaret(tab);
  // instead of 8 lines above, the commented lines below can be used as well
  //if(oEditor._ie)
  // iged_insText(tab);
  //else
  // iged_insNodeAtSel(document.createTextNode(' '));
  oEvent.cancel = true;
 }
}