document.write("<script>function search_check(obj){if(obj.keyboard.value==''){alert('请输入搜索关键字');obj.keyboard.focus();return false;}return true;}</script><table border=0 cellpadding=3 cellspacing=1><form name=search_js1 method=post action='http://www.dzbzw.com/down/search/index.php' target='_blank' onsubmit='return search_check(document.search_js1);'><tr><td><div align=center>&#9758;&nbsp;标准搜索:<select name=show><option value=1>标准编号</option><option value=1>标准名称</option><option value=1>不限</option></select><select name=classid><option value=0>所有类别</option><option value=1>|-国家标准</option><option value=2>|-行业标准</option><option value=3>|-国际标准</option><option value=4>|-其它标准</option></select><input name=keyboard type=text size=13><input type=submit name=Submit value=搜索标准></div></td></tr></form></table>");