if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=599035\" target=\"_self\">黑金－石油的秘密</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=599619\" target=\"_self\">汽油的蒸发性指标介绍</a></div>\n';