var pages=document.URL ;
var pagep=pages.lastIndexOf("\\");
if (pagep<1) {pagep=pages.lastIndexOf("/");}
var pagec = pages.substring(pagep+1) ;
pagep=pagec.lastIndexOf(".");
var pagebare = pagec.substring(0,pagep) ;
var pagepre = pagebare-1 ;
var pagenext = pagebare -0 + 1 ;
if (pagepre%1000!=0)
{document.write("<TD width=33% align=center><A HREF="+pagepre+".htm><FONT COLOR=BLUE>上一页</font></a>") ;} 
else
{document.write("<TD width=33% align=center>&nbsp;");} 
document.write("</td><td width=34% align=center>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<A HREF=index.htm><font color=blue>目录</font></a>") ; 
document.write("</td><td width=33% align=center>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="+pagenext+".htm><font color=blue>下一页</font></a></td></tr>") ;