有人在群里問如何在iframe框架加個打開和關(guān)閉的按鈕，當(dāng)單擊“打開”按鈕就讓iframe顯示出來，當(dāng)單擊“關(guān)閉”按鈕就隱藏iframe,這個功能群中給出了解決方法

具體實(shí)現(xiàn)操作如下：
<script language="JavaScript">
var act;
function over(){
var h = parseInt(mytd.height);
if (h <= 400){
mytd.height = h + 20;
clearTimeout(act);
act = setTimeout('over()', 10);
}
}
function out(){
var h = parseInt(mytd.height);
if (h >= 0){
mytd.height = h - 20;
clearTimeout(act);
act = setTimeout('out()', 10);
}
}
</script>
<input name="Submit" type="button" id="Submit" onClick="over()" value="打開">
<input name="Submit2" type="button" id="label" onClick="out()" value="關(guān)閉">
<table width="316" height="1" cellpadding="0" cellspacing="0" id="mytd" >
<tr>
<td ><iframe width="760" height="100%" src="" FRAMEBORDER=0 scrolling="no"></iframe></td>
</tr>
</table>