if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=597399\" target=\"_self\">能源知识：原油性质分类简介</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=598600\" target=\"_self\">柴油的洁净度、安定性和腐蚀性</a></div>\n';