jquery自动生成分页控件

/*

pagenum:当前页数
theallnum：总条数
themeiye：每页显示多少条

*/

function pagetest(pagenum, theallnum, themeiye) {
    $("#pages").html("");
    var allnum = theallnum; //总页数
    var meiye = themeiye; //每页显示条数
    var xsnumber = 6;
    var cjnum = Math.ceil(allnum / meiye);
    var str = "";
    var activepage = pagenum;
    var prevpage = parseInt(activepage) - 1;
    var nextpage = parseInt(activepage) + 1;


    if (activepage != 1) {
        str = '<a data-href="' + prevpage + '">上一页</a>'
    }
    if (cjnum > 6) {
        if (pagenum > 3) {
            if (pagenum + 2 < cjnum) {
                for (var i = pagenum - (xsnumber - 4) ; i <= pagenum + (xsnumber - 4) ; i++) {
                    loadpage(i);
                }
                str += "...";
                str += '<a data-href="' + cjnum + '">' + cjnum + '</a>';
            }
            else {
                for (var j = 1; j <= activepage - (cjnum - (xsnumber - 3)) ; j++) {
                    loadpage(j);
                }
                str += '<span>...</span>';
                for (var i = activepage - 2; i <= cjnum; i++) {
                    loadpage(i);
                }
            }
        }
        else {
            for (var i = 1; i < xsnumber; i++) {
                loadpage(i);
            }
            str += '<span>...</span>';
            str += '<a data-href="' + cjnum + '">' + cjnum + '</a>';
        }

        if (activepage != cjnum) {
            str += '<a data-href="' + nextpage + '">下一页</a>'
        };
        $("#pages").append(str);
    }
    else {
        for (var i = 1; i <= cjnum; i++) {
            loadpage(i);
        }
        if (activepage != cjnum) {
            str += '<a data-href="' + nextpage + '">下一页</a>'
            console.log(nextpage)
        };
        $("#pages").append(str);
        //countMaxH();
    }
    function loadpage(i) {
        i == activepage ? str += '<a class="active" data-href="' + i + '">' + i + '</a>' : str += '<a data-href="' + i + '">' + i + '</a>';
    }

};