js对文章内容进行分页实现代码

<div id="showContent">{$article.content|htmlspecialchars_decode}</div>
<div id="articlePages"></div>

<script type="text/javascript">
var obj = document.getElementById("showContent");
var pages= document.getElementById("articlePages");
//alert(obj.scrollHeight);
window.onload= function()
{
var all=Math.ceil(parseInt(obj.scrollHeight)/ parseInt(obj.offsetHeight));
//获取总页数，主要是应用scrollHeight
pages.innerHTML="共"+ all +"页";
for(var i=1; i<=all;i++)
{
pages.innerHTML +=" <a href=\javascript:showPage('"+i+"');> "+i+"</a> ";
//输出所有页码
}
}
function showPage(pageIndex)
{
obj.scrollTop = (pageIndex-1)* parseInt(obj.offsetHeight);
}
</script>

#showContent {
color:black;
font-size: 16px;
height: 700px;
overflow: hidden;
}
#articlePages {
text-align: right;
}