<form action="{$searchurl}" method="get">
                    <input class="fl" name="keyword" placeholder="请输入搜索关键词" type="text">
                    <input class="ip01 fl" type="button" >
 
          <script type="text/javascript">
               $(".ip01").click(function(){
                    $(this).attr('type','submit');
                    $(this).val('');
               })
          </script>

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