js文本中搜索关键词输入效果

<table width="1000" height="20" border="0" align="center" cellpadding="0" cellspacing="0"><tr> <form id="searchform" name="searchform" method="get" action="search.asp"> <td width="478" align="right" valign="middle"> <input name="keyword" type="text" class="searchpannel" value="请输入关键字" onmouseover="this.focus()" onblur="if (this.value =='') this.value='请输入关键字'" onfocus="this.select()" onclick="if (this.value=='请输入关键字') this.value=''"><select style="width:120px" name="channelid"><option value="0">搜索类型 </option> <option value="1">文章 </option> <option value="2">图片 </option> <option value="5">商品 </option> <option value="111">点评 </option></select><input type="submit" class="inputbutton" name="submit1" value="站内搜索">   </td> </form> <td width="522"></td> </tr></table>
[ctrl+a 全选 注:如需引入外部js需刷新才能执行]