if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=371408\" target=\"_self\">清洁柴油车存在认识误区</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=381699\" target=\"_self\">油船类别介绍</a></div>\n';