div超长内容分页

$(function () {
    function showPage(index) {
        var i = parseInt(index);
        obj.scrollTop = (i - 1) * parseInt(obj.offsetHeight);
    }
    var obj = document.getElementById("article");
    var pages = document.getElementById("pages");
    var allpages = Math.ceil(parseInt(obj.scrollHeight) / parseInt(obj.clientHeight));
    pages.innerHTML = "<b>共" + allpages + "页</br>";

    for(var i=1;i<=allpages;i++)
    {
        pages.innerHTML += "<a href=‘#‘ id="+i+">"+"第"+i +"页"+"</a>&nbsp;";
    }
    $("a").on("click", function (e) {
        var c = e.target;
        showPage(c.getAttribute(‘id‘));
    });
});