var myeditor;
function start() {
 var myeditor = document.getElementById("monEditeur");
  myeditor.setAttribute("src","http://www.xulfr.org");
  editorTimer();
 }
 
function editorTimer(){

var observer = 
		{
		// Components.interfaces.nsIObserver
		observe: function()
			{	
		if(myeditor.contentWindow.location!="about:blank"){
					timer.cancel();
					myeditor.makeEditable("html",false);
					myeditor.contentDocument.designMode="On";
					HTMLEditor=myeditor.getHTMLEditor(myeditor.contentWindow);
					editor=myeditor.getEditor(myeditor.contentWindow);
				}
					
			},

			// Components.interfaces.nsISupports
			QueryInterface : function(iid)
			{
				if ( iid.equals(Components.interfaces.nsIObserver) ||
				iid.equals(Components.interfaces.nsISupportsWeakReference)
				|| iid.equals(Components.interfaces.nsISupports))
				return this;
				throw Components.results.NS_NOINTERFACE;
			}
		};

	var c, timer;

	c = Components.classes["@mozilla.org/timer;1"];
	timer = c.createInstance(Components.interfaces.nsITimer);

	timer.init(observer, 100, timer.TYPE_REPEATING_SLACK);
}