if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=331434\" target=\"_self\">油气回收</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=340957\" target=\"_self\">碳税、能源税、环境税的联系与区别</a></div>\n';