jquery.validate-摘录
accept说明：<input type="file" id="avatar" name="avatar" />accept接受的是：image (png, jpg, jpeg, gif)<input type="file" id="cv" name="cv" />accept接受的是：document (doc, docx, txt, pdf)?
单选：<style type="text/css">label.error { display: none; }</style><fieldset><legend>Gender</legend><label for="gender_male"><input type="radio" id="gender_male" value="m" name="gender" validate="required:true" />Male</label><label for="gender_female"><input type="radio" id="gender_female" value="f" name="gender"/>Female</label><label for="gender" name="code">下拉菜单：<select id="cars" name="cars" title="Please select at least two cars, but no more than three" validate="required:true, rangelength:[2,3]" multiple="multiple"><option value="m_sl">Mercedes SL</option><option value="o_c">Opel Corsa</option><option value="vw_p">VW Polo</option><option value="t_s">Titanic Skoda</option></select>