W3C Validator Bookmarklet

W3CValidator.js

javascript:(function(){var%20form=document.createElement("form");form.style.display='none';form.setAttribute("method","post");form.setAttribute("action","http://validator.w3.org/check");var%20hiddenField=document.createElement("input");hiddenField.setAttribute("name","fragment");hiddenField.setAttribute("value",'<!DOCTYPE%20'+document.doctype.name+(document.doctype.publicId?'%20PUBLIC%20"'+document.doctype.publicId+'"':'')+(!document.doctype.publicId&&document.doctype.systemId?'%20SYSTEM':'')+(document.doctype.systemId?'%20"'+document.doctype.systemId+'"':'')+'>\n'+document.documentElement.outerHTML);form.appendChild(hiddenField);document.body.appendChild(form);form.submit();})();