javascript 仿百度分页函数

/**
  * Ajax分页功能
  * 在需要分页的地方添加<ul class="pagination"></ol>
  * 作为分页组件容器元素。
  * pageCount 总页数
  * currentPage 当前页数
  * container 带有pagination类的ol容器元素
  * loadData 用于加载数据的函数
  * version 1.0
  */
pagination : function(pageCount, currentPage, container, loadData) {
this.startPage = 1;
this.endPage = pageCount;
this.minDisplayPageCount = 5;
var c = $(container);
var paginationLinks = "";
if(pageCount == 1) {
c.css({'visibility': 'hidden'});
return;
}
if(pageCount > this.minDisplayPageCount + 1) {
if(currentPage - this.minDisplayPageCount > 0) {
this.startPage = currentPage - this.minDisplayPageCount;
}
if((currentPage + this.minDisplayPageCount - 1) < pageCount) {
this.endPage = currentPage + this.minDisplayPageCount - 1;
} else {
this.endPage = pageCount;
}
 }

paginationLinks += "<ul>";

 if(currentPage != 1) {
paginationLinks += "<li><a id='prevpage' href='javascript:;' rel='prev'>《上一页</a></li>";
}

for(var i = this.startPage; i <= this.endPage; i++) {
if(currentPage == i) {
paginationLinks += "<li id='page_" + currentPage + "_container'><a id='page_" + i + "' class='current' href='javascript:;'>" + currentPage + "</a></li>";
} else {
paginationLinks += "<li id='page_" + i + "_container'><a id='page_" + i + "' href='javascript:;'>" + i + "</a></li>";
}
}

if(currentPage < pageCount) {
paginationLinks += "<li><a id='nextpage' href='javascript:;' rel='next'>下一页》</a></li>";
}

paginationLinks += "</ul>";


c.html(paginationLinks);
var links = $("#page_number ul li a");

links.each(function(index) {
if(!(this.innerHTML == "上一页" || this.innerHTML == "下一页")) {
$(this).click(function(event) {
alert(links[index].innerHTML);
loadData(curTaskId,"","",parseInt(links[index].innerHTML));
pagination(pageCount, parseInt(links[index].innerHTML), container, loadData);
});
}
});
var prevPage = $("#prevpage");
var nextPage = $("#nextpage");
c.css({'visibility': 'visible'});
if(prevPage) {
prevPage.click(function(event) {
loadData(curTaskId,"","",currentPage - 1);
pagination(pageCount,  currentPage - 1, container, loadData);
});
}
if(nextPage) {
nextPage.click(function(event) {
loadData(curTaskId,"","",currentPage + 1);
pagination(pageCount, currentPage + 1, container, loadData);
});
}
}

loadData为加载数据的函数，这个函数需要定义一个当前页数的参数，比如：

var  currentPage  = 1;

loadExamList(currentPage){

  //TODO

  pagination(5,currentPage,$(ul),loadExamList);

};

5是总页数，1是当前页数，$(ul)是要将页码按钮存放的位置，loadExamList是点击上一页、下一页或者页码的时候调用的函数。