Avoid createElement function if it's inside a <LI> element (contentEditable)

Question

I'm using this function in order to replace <DIV>New Divs</DIV> with <BR> in break lines on contentEditable divs using Safari and Chrome:

$("#form_description").live("keypress", function(e){
if (e.which == 13) {
if (window.getSelection) {
  var selection = window.getSelection(),
      range = selection.getRangeAt(0),
      br = document.createElement("br");
  range.deleteContents();
  range.insertNode(br);
  range.setStartAfter(br);
  range.setEndAfter(br);
  range.collapse(false);
  selection.removeAllRanges();
  selection.addRange(range);
  return false;
}
}
});

The problem is that when I'm typing inside an <UL><LI>Something</LI></UL> and I press the "return" key, I don't want to get a <BR>, so I can continue whit the list...

How could I create a condition for that function not to work if I'm inside a LI element?

EDIT WITH MY ANSWER:

Ok, I've managed to do it, but If you have any comment on the code, you're welcome:

$("#form_description").live("keypress", function(e){
if (e.which == 13) {

  node = document.getSelection().anchorNode;
  nodeName = node.parentNode.nodeName.toLowerCase();

  if ((nodeName != "li") && (nodeName != "blockquote")) {
... etc }

Answer 1

First, use keyup as the event name, keypress works only on Firefox.

Second, e.which is not always available. Use e.keyCode primarily, and fall back to e.which:

var code = e.keyCode || e.which;
if (code == 13) {
  // your code here..
}

Third, if you need to cancel default events fired in the key-press, you might want to throw in a preventDefault() inside your event handler routine. Make sure it's the first line.

function(e){
   e.preventDefault();
 ..
}