document.write('<script language="javascript" id="src_field_list"></script>');document.write('<select id="search_channel_list" style="width:110px" onchange=\' SetSearchField("",this)\'>');document.write('<option value="0">请选择频道</option>');document.write('<option value="1">资讯频道</option>');document.write('<option selected="selected" value="8">供求频道</option>');document.write('<option value="10">公司频道</option>');document.write('<option value="14">栽培技术</option>');document.write('<option value="18">会展频道</option>');document.write('</select>');document.write('&nbsp;<input type="text" style="width:200px" maxlength="50" id="search_txt_keyword" tabindex="1" onkeydown=\'event.keyCode==13?ketEnter():"" \' />');document.write('&nbsp;<input id="sear" type="button" value="搜索" onclick=\'goSearchNews("")\'/>');