function getNav(nCurrentPage,nCountPage,sPageName,sPageEXT)
{ 

var currentPage =nCurrentPage;//所在页从0开始
var prevPage = currentPage-1;//上一页
var nextPage = currentPage+1;//下一页
var countPage = nCountPage//;共多少页

//设置上一页代码
if(countPage>1&&currentPage!=0&&currentPage!=1)
	document.write("<a href=\""+sPageName.sPageEXT+"\" >首页</a>&nbsp;&nbsp;<a href=\""+sPageName+"_" + prevPage + "."+sPageEXT+"\" >上一页</a>&nbsp;&nbsp;<<");
else if(countPage>1&&currentPage!=0&&currentPage==1)
	document.write("<a href=\""+sPageName.sPageEXT+"\" >首页</a>&nbsp;&nbsp;<a href=\""+sPageName+"."+sPageEXT+"\" >上一页</a>&nbsp;&nbsp;<<");
else
	document.write("首页&nbsp;&nbsp;上一页&nbsp;&nbsp;<<");
//循环
var num = 9;
	for(var i=0+(currentPage-1-(currentPage-1)%num) ; i<=(num+(currentPage-1-(currentPage-1)%num))&&(i<countPage) ; i++){
		if(currentPage==i)
			document.write((i+1)+"</span>&nbsp;&nbsp;");
		else if(i==0)
			document.write("<a href=\""+sPageName+"."+sPageEXT+"\" >"+(i+1)+"</a>&nbsp;&nbsp;");
		else
			document.write("<a href=\""+sPageName+"_" + i + "."+sPageEXT+"\">"+(i+1)+"</a>&nbsp;&nbsp;");
	}


//设置下一页代码 
if(countPage>1&&currentPage!=(countPage-1))
	document.write(">>&nbsp<a href=\""+sPageName+"_" + nextPage + "."+sPageEXT+"\" >下一页</a>&nbsp;&nbsp;<a href=\""+sPageName+"_"+ (countPage-1) + "."+sPageEXT+"\" >末页</a>&nbsp;&nbsp;");
else
	document.write(">>&nbsp下一页&nbsp;&nbsp;末页&nbsp;&nbsp;");
	
 
}