Javascript實(shí)現(xiàn)的分頁函數(shù)

2024-09-06 12:44:13

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From: IECN.Net ; Author: 鐘鐘

/**
* 分頁類構(gòu)造
* 參數(shù) nTotalList: 總條數(shù)
* 參數(shù) nPageSize: 每頁顯示條數(shù)
* 參數(shù) nPageNum: 當(dāng)前頁碼
* 參數(shù) sPageUrl: 分頁鏈接的URL，頁碼以[pn]代替，輸出時(shí)將被替換為實(shí)際頁碼
* 參數(shù) nPageListSize: 頁碼列表（下拉框）中顯示的最多頁碼條數(shù)。該參數(shù)可省略，默認(rèn)100
*/
function Pagination(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;
}

/**
* 生成分頁，將HTML直接輸出
* 無參數(shù)
* 無返回值
*/
Pagination.prototype.generate = function() {
  var output = "";
  output += "<table width=/"98%/" cellspacing=/"1/" cellpadding=/"3/" align=/"center/"><tr><td align=/"right/">";
  output += "共 " + this.totalList + " 條每頁 " + this.pageSize + " 條當(dāng)前第 ";
  output += "<select onchange=/"if(this.value)location.href='" + this.pageUrl + "'.replace(///[pn//]/,";
  output += "this.value);/" align=/"absMiddle/" style=/"font:normal 9px Verdana,Arial,宋體;/">";
  var firstPage = this.pageNum - Math.floor(this.pageListSize/2);
  if (firstPage < 1)
    firstPage = 1;
  var lastPage = 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 += "<option value=/"1/">1</option>";

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