if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=201480\" target=\"_self\">二甲醚简介</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=223090\" target=\"_self\">什么是闪点？</a></div>\n';