gistfile1.txt

var parser = ZeParser.createParser(ta.value);
parser.tokenizer.fixValues();
var wtree = parser.tokenizer.wtree;

ta.className = '';
var ide = wtree.map(function(t){
	if (t.name == 14) ta.className = 'error';
	return '<span class="t'+t.name+'">'+(t.name==13?'\u29e6':(t.name==14?'\u292c':t.value)).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;')+'</span>';
});

cover.innerHTML = ide.join('');