function getPager(url, sum, int currnum, int length) {
		if (length >= sum) {
			return "";
		}

		var showsum = "总共";
		var showitem = "条数据";
		var showfirstpage = "首页";
		var showuppage = "上一页";
		var shownextpage = "下一页";
		var showlastpage = "末页";
		var showjump = "跳转到";
		var showselect = "请选择";
		var showtotal = "共";
		var showpage = "页";

		var pagerinfo = '';
		var sbinfo = '';
		sbinfo+="<div class='pager'>";
		var pagenum = 0;

		if (sum % length == 0) {

			pagenum = sum / length;

		} else {
			pagenum = sum / length-0 + 1;
		}

		var first = "";
		if (url.indexOf("?") != -1) {
			first = "&";
		} else {
			first = "?";
		}
		var pageUrl = "";
		sbinfo+=(showsum + "<font color=\"red\">" + sum + "</font>"
				+ showitem + "   ");
		var firstUrl = url + first + "currpage=" + 1 + "&" + condtion;
		sbinfo+=("<a class='btn btn-default' href=\"" + firstUrl + "\">"
				+ showfirstpage + "</a>  ");
		if (1 == currnum) {

			sbinfo+=(showuppage + " ");

		} else {

			pageUrl = url + first + "currpage=" + (currnum - 1) + "&"
					+ condtion;
			sbinfo+=("<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
					+ pageUrl + "\" >" + showuppage + "</a> ");
		}

		String tempstr = "";
		if (pagenum < 6) {
			for (int i = 1; i < pagenum + 1; i++) {
				pageUrl = url + first + "currpage=" + i + "&" + condtion;
				if (i == currnum) {

					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font color=\"red\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=(tempstr);
			}
		} else if (currnum > pagenum - 3) {

			sbinfo+=(". . . ");
			for (int i = currnum - 4; i < pagenum + 1; i++) {
				pageUrl = url + first + "currpage=" + i + "&" + condtion;
				if (i == currnum) {

					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font color=\"red\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=(tempstr);
			}

		} else if (currnum < 4) {

			for (int i = 1; i < currnum + 3; i++) {
				pageUrl = url + first + "currpage=" + i + "&" + condtion;

				if (i == currnum) {

					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font  color=\"red\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=(tempstr);
			}
			sbinfo+=(". . . ");
		} else {
			sbinfo+=(". . . ");
			for (int i = currnum - 2; i < currnum + 3; i++) {
				pageUrl = url + first + "currpage=" + i + "&" + condtion;

				if (i == currnum) {

					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font  color=\"red\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='btn btn-default'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=tempstr);
			}
			sbinfo+=(". . . ");
		}

		if (currnum == pagenum) {

			sbinfo+=(shownextpage);

		} else {
			pageUrl = url + first + "currpage=" + (currnum + 1) + "&"
					+ condtion;
			sbinfo+=("<a class='btn btn-default'  href=\"" + pageUrl
					+ "\">" + shownextpage + "</a>");

		}

		String endUrl = url + first + "currpage=" + pagenum + "&" + condtion;
		sbinfo+=(" <a class='btn btn-default'  href=\"" + endUrl + "\">"
				+ showlastpage + "</a>   ");

		String selecturl = url + first + condtion;
		sbinfo+=showjump
				+ "<select class='form-control' onchange=\"window.location.href='"
				+ selecturl + "&currpage='+this.value;\">");
		sbinfo+=("<option value=\"\" selected>" + showselect + "</option>");

		for (int i = 1; i < pagenum + 1; i++) {
			sbinfo+=("<option value=\"" + i + "\">" + i + "</option>");
		}
		sbinfo+=("</select>");
		sbinfo+=("  " + showtotal + "<font color=\"red\">" + pagenum
				+ "</font>" + showpage);
		sbinfo+=("</div>");
		pagerinfo = pagerinfo;

		return pagerinfo;
	}