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。