JS实现滑动展开与折叠效果

【 tulaoshi.com - Web开发 】

以下是引用片段：
script type="text/javascript"
//Url: http://bbs.51js.com/thread-61646-1-1.html
//Author: 风云突变
//Modify: 枫岩
var act;
function over(s,nMax){
  var obj=document.getElementById(s);
  var h = parseInt(obj.offsetHeight);
  if (h nMax){
    obj.style.height = (h + 2)+"px";
    clearTimeout(act);
    act = setTimeout("over(''"+s+"'',"+nMax+")", 10);
  }
}
function out(s,nMin){
  var obj=document.getElementById(s);
  var h = parseInt(obj.offsetHeight);
  if (h nMin){
    obj.style.height = (h - 2)+"px";
    clearTimeout(act);
    act = setTimeout("out(''"+s+"'',"+nMin+")", 10);
  }
}
/script
div id="mytd" onmouseover="over(''mytd'',200);" onmouseout="out(''mytd'',30);" style="background:#eee;"代码实例：层的滑动展开/折叠/div

无忧网友 fangxiao9159 再次优化后：
以下是引用片段：
script type="text/javascript"
var intervalId = null;
function move(id,state){
  var obj = document.getElementById(id);
  if(intervalId != null) 
    window.clearInterval(intervalId);
  function change(){
   var h = parseInt(obj.offsetHeight);
   obj.style.height = (state == "down") ？ (h + 2) : (h - 2);
  }
  intervalId = window.setInterval(change,10);
}
/script
table border="1" cellpadding="0" cellspacing="0" id="mytd" onmouseover="move(''mytd'',''down'');" onmouseout="move(''mytd'',''out'');"
trtd无忧脚本 - 风云突变/td/tr/table