js实现右下角窗口弹出窗口效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
    <head> 
        <meta http-equiv="Content-Type" content="text/html; charset=GB2312" /> 
        <title>右下角弹窗效果练习 by 阿会楠</title> 
        <script language="JavaScript" type="text/javascript"> 
            function $(obj){ 
                return document.getElementById(obj); 
            } 
            function pop(obj){ 
                var h = parseInt($("popDiv").currentStyle.height); 
                $("popDiv").style.height = (h + obj) + "px"; 
                if(parseInt($("popDiv").style.height) < 2){ 
                    window.clearInterval(timer); 
                    $("popDiv").style.display = "none"; 
                } 
                if(parseInt($("popDiv").style.height) >= 200){ 
                    window.clearInterval(timer); 
                } 
         
            } 
             
            var timer; 
            function runtimer(obj){ 
                timer = window.setInterval(function(){pop(obj)},10); 
            } 
            window.onload = function(){ 
                runtimer(2); 
            } 
        </ script> 
    </head> 
    <body> 
        <div style="position:absolute;right:0;bottom:0;height:0px;width:200px;border:1px solid red;" id="popDiv"> 
        × 
        </div> 
    </body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

js实现右下角窗口弹出窗口效果_javascript技巧