Creo que esta bien el doctype
Código HTML:
Ver original<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="es" xml:lang="es">
<meta http-equiv="content-type" content="text/html; charset=UTF-8" /> <meta http-equiv="content-style-type" content="text/css" /> <meta http-equiv="content-language" content="es" /> <meta http-equiv="imagetoolbar" content="no" /> <meta name="resource-type" content="document" /> <meta name="distribution" content="global" /> <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9" />