javascript 控制显示隐藏如何实现

大概改了下。里面还需要重写。有些会有冲突的。<!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>
    <title>Introduction to the GNSS and LBS Association of China</title>
   <script type="text/javascript" language="javascript">
    var time = 500;
    var h = 0;
    function addCount()
    {
        if(time>0)
        {
            time--;
            h = h+5;
        }
        else
        {
            return;
        }
        if(h>482)  //高度
        {
            return;
        }
        document.getElementById("ads").style.display = "";
        document.getElementById("ads").style.height = h+"px";
        setTimeout("addCount()",30);
    }

    window.onload = function showAds()
    {
        addCount();
        setTimeout("noneAds()",40000); //停留时间自己适当调整
    }
    </script>

    <script type="text/javascript" language="javascript">
    var T = 260;
    var N = 260; //高度
    function noneAds()
    {
        if(T>0)
        {
            T--;
            N = N-5;
        }
        else
        {
            return;
        }
        if(N<0)
        {
            document.getElementById("ads").style.display = "none";
            return;
        }

        document.getElementById("ads").style.height = N+"px";
        setTimeout("noneAds()",30);
    }
function goUp(){
if(document.getElementById("ads").style.display == "none"){
addCount();
time = 500;
h = 0;
}else{
noneAds();
}}
    </script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><style type="text/css">

</style></head>
<body>
    <div id="ads" style="margin:auto; display:none; width:900px; top:0px; height:0px; border:solid 1px #000; background-color:#fafafa; overflow:hidden; text-align:center;">
<td width="900" height="482"><a href="http://www.xiazai.com"><img src="1.gif" border="0" alt="A5下载"></a></td>
    </div>
    <div id="bottom" style="margin:auto; width:900px; height:80px; border:solid 1px #000; background-color:#fafafa; text-align:center;">
          <div align="center"><br>
              <span class="STYLE1">Introduction to the GNSS and LBS Association of China</span><br>
              <span class="STYLE2">          </span><br>
              <input type="button" value="remove A5 download" onclick="javascript:document.getElementById('ads').remove();" />
              <input type="button" value="remove bottom" onclick="javascript:document.getElementById('bottom').remove();" />
       <input type="button" value="return Up" onclick="javascript:goUp()" />
          </div>
        <p align="center" class="STYLE3"></p>
        <p align="center" class="STYLE3"></p>
    </div>
</body>
</html>

学习下jquery吧，那里面有个方法，比如:
$("p").show("slow");

看你感激涕零的啊，有问题就直接问好了，搞的我很不好意思啊
之前那是把元素直接删了，你用css控制下就行了，display="none" / “block”<!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>
    <title>Introduction to the GNSS and LBS Association of China</title>
   <script type="text/javascript" language="javascript">
    var time = 500;
    var h = 0;
    function addCount()
    {
        if(time>0)
        {
            time--;
            h = h+5;
        }
        else
        {
            return;
        }
        if(h>482)  //高度
        {
            return;
        }
        document.getElementById("ads").style.display = "";
        document.getElementById("ads").style.height = h+"px";
        setTimeout("addCount()",30);
    }

    window.onload = function showAds()
    {
        addCount();
        setTimeout("noneAds()",40000); //停留时间自己适当调整
    }
    </script>

    <script type="text/javascript" language="javascript">
    var T = 260;
    var N = 260; //高度
    function noneAds()
    {
        if(T>0)
        {
            T--;
            N = N-5;
        }
        else
        {
            return;
        }
        if(N<0)
        {
            document.getElementById("ads").style.display = "none";
            return;
        }

        document.getElementById("ads").style.height = N+"px";
        setTimeout("noneAds()",30);
    }
    </script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><style type="text/css">

</style></head>
<body>
    <div id="ads" style="margin:auto; display:none; width:900px; top:0px; height:0px; border:solid 1px #000; background-color:#fafafa; overflow:hidden; text-align:center;">
<td width="900" height="482"><a href="http://www.xiazai.com"><img src="1.gif" border="0" alt="A5下载"></a></td>
    </div>
    <div id="bottom" style="margin:auto; width:900px; height:80px; border:solid 1px #000; background-color:#fafafa; text-align:center;">
          <div align="center"><br>
              <span class="STYLE1">Introduction to the GNSS and LBS Association of China</span><br>
              <span class="STYLE2">          </span><br>
  <input type="button" value="hide A5 download" onclick="javascript:document.getElementById('ads').style.display='none';" />
  <input type="button" value="show A5 download" onclick="javascript:document.getElementById('ads').style.display='block';" />

          </div>
        <p align="center" class="STYLE3"></p>
        <p align="center" class="STYLE3"></p>
    </div>
</body>
</html>

jquery不会的话就把js和css都学一下。w3cschool:http://www.w3school.com.cn/

帮你把标题改了，刚刚回复了个帖子讲这个事：http://bbs.csdn.net/topics/390623576#post-395950912

谢谢各位，版主不用不好意思啊。散分平均了啊因为百度知道被封，在网上找答案无果，有幸看到了CSDN，知道这里都是技术大拿，但大家都很忙，不一定会对我这没啥技术的贴有兴趣，本来想等几天的，结果大家都很帮忙我从来都是扒别人的用，有些简单参数改一改，早先想学来的，现在更想学了。今天的收获是扒了下拉广告下来，在CSDN了解到了如何收回和展开下拉广告。

调试易

javascript 控制显示隐藏如何实现

解决方案 »