if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=593254\" target=\"_self\">汽油产品基本知识</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=593256\" target=\"_self\">如何选用轻柴油的牌号</a></div>\n';