if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=160955\" target=\"_self\">普氏对燃料油的质量要求</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=160957\" target=\"_self\">纸货市场的概念</a></div>\n';