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="31">试题资料</option>');document.write('<option value="41">培训课程</option>');document.write('<option value="38">网络课堂</option>');document.write('<option value="33">IT教程</option>');document.write('<option value="34">公文范本</option>');document.write('<option value="37">文学书库</option>');document.write('<option value="36">报考资讯</option>');document.write('</select>');document.write('<select id="search_field_list" style="width:110px"><option value="0">选择搜索字段</option></select>');document.write('<input type="text" maxlength="50" id="search_txt_keyword" />');document.write('<input type="button" value="搜索" onclick=\'GoSearch("")\'/>');