gistfile1.txt

this.readOnly = true;
	                this.set('disabled', true);
	                this.hide();
	                this.saveHTML();
	                this.get('iframe').setStyle('visibility', 'hidden');
	                var iframe = this.get('iframe');
	                this.set('iframe', this._readOnlyFrame);
	                this.get('iframe').setStyle('visibility', 'visible');
	                this.get('iframe').setStyle('height', '100%');
	                this._setInitialContent();
	                this.set('iframe', iframe);