From:IECN.Net;Author:钟钟

/**

*分页类构造

*参数nTotalList:总条数

*参数nPageSize:每页显示条数

*参数nPageNum:当前页码

*参数sPageUrl:分页链接的URL，页码以[pn]代替，输出时将被替换为实际页码

*参数nPageListSize:页码列表（下拉框）中显示的最多页码条数。该参数可省略，默认100

*/

functionPagination(nTotalList,nPageSize,nPageNum,sPageUrl,nPageListSize){

this.totalList=nTotalList;

this.pageSize=nPageSize;

this.pageNum=nPageNum;

if(nTotalList==0)

this.totalPages=1;

else

this.totalPages=Math.floor((this.totalList-1)/this.pageSize+1);

this.pageUrl=sPageUrl;

if(arguments[4])

this.pageListSize=nPageListSize;

else

this.pageListSize=100;

}

/**

*生成分页，将HTML直接输出

*无参数

*无返回值

*/

Pagination.prototype.generate=function(){

varoutput="";

output+="<tablewidth="98%"cellspacing="1"cellpadding="3"align="center"><tr><tdalign="right">";

output+="共"+this.totalList+"条每页"+this.pageSize+"条当前第";

output+="<selectonchange="if(this.value)location.href='"+this.pageUrl+"'.replace(/[pn]/,";

output+="this.value);"align="absMiddle"style="font:normal9pxVerdana,Arial,宋体;">";

varfirstPage=this.pageNum-Math.floor(this.pageListSize/2);

if(firstPage<1)

firstPage=1;

varlastPage=firstPage+this.pageListSize-1;

if(lastPage>this.totalPages){

lastPage=this.totalPages;

firstPage=lastPage-this.pageListSize+1;

if(firstPage<1)

firstPage=1;

}

if(firstPage>1){

output+="<optionvalue="1">1</option>";

if(firstPage>2)

output+="<optionvalue="">…</option>";

}

for(varp=firstPage;p<=lastPage;p++){

output+="<optionvalue=""+p+""";

if(p==this.pageNum)

output+="selected="yes"";

output+=">"+p+"</option>";

}

if(lastPage<this.totalPages){

if(lastPage<this.totalPages-1)

output+="<optionvalue="">…</option>";

output+="<optionvalue=""+this.totalPages+"">"+this.totalPages+"</option>";

}

if(this.pageNum>this.totalPages)

output+="<optionvalue=""selected="yes">页码超出范围</option>";

output+="</select>";

output+="/"+this.totalPages+"页";

if(this.pageNum==1){

output+="[首页]";

output+="[上页]";

}

else{

output+="<ahref=""+this.pageUrl.replace(/[pn]/,"1")+"">[首页]</a>";

output+="<ahref=""+this.pageUrl.replace(/[pn]/,this.pageNum-1)+"">[上页]</a>";

}

if(this.pageNum==this.totalPages){

output+="[下页]";

output+="[尾页]";

}

else{

output+="<ahref=""+this.pageUrl.replace(/[pn]/,this.pageNum+1)+"">[下页]</a>";

output+="<ahref=""+this.pageUrl.replace(/[pn]/,this.totalPages)+"">[尾页]</a>";

}

output+="</td></tr></table>";

document.writeln(output);

}

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