// ==UserScript==
// @name          TextArea Character Count
// @namespace     http://gavinsharp.com/scripts
// @description	  Displays the total number of characters in textareas
// ==/UserScript==

(function() {
  function onInput(aEvent) {
    charCount(aEvent.target);
  }
  
  function charCount(aTextArea, aIndex) {
    var cctext = document.getElementById('__cc_' + aTextArea.id);
    if (!cctext) {
      cctext = document.createElement('span');
      cctext.id = '__cc_' + aTextArea.id;
      var count = document.createTextNode('CC: ' + aTextArea.value.length);
      cctext.appendChild(count);
      aTextArea.parentNode.insertBefore(cctext, aTextArea.nextSibling);
    } else {
      cctext.textContent = 'CC: ' + aTextArea.value.length;
    }
  }

  var xpath = "//textarea";
  var res = document.evaluate(xpath, document, null,
                              XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null); 
  var i, textarea;
  for (i = 0; textarea = res.snapshotItem(i); ++i) {
    if (!textarea.id)
      textarea.id = '__textarea_' + i;
    charCount(textarea);
    textarea.addEventListener('input', onInput, false);
  }
  
})();