{eyou:searchform type='default'} <form method="get" action="{$field.action}" onsubmit="return searchForm();"> <input type="text" name="keywords" id="keywords" placeholder="请输入关键字"> <input type="submit" value="搜索"> {$field.hidden} </form> <script> function searchForm() { var keywords = document.getElementById('keywords').value; if (keywords == '') { alert('请输入关键字'); return false; } return true; } </script> {/eyou:searchform}