示例程式碼：

$(function(){
    console.log(window.location.href)
    if (self.frameElement && self.frameElement.tagName == "IFRAME") {
        // alert('在iframe中');
        window.open(window.location.href)

        parent.location.reload(true);
        var index = parent.layer.getFrameIndex(window.name);
        parent.layer.close(index);
    }
   });
 

//方式一
if (self.frameElement && self.frameElement.tagName == "IFRAME") {
  alert('在iframe中');
}
//方式二
if (window.frames.length != parent.frames.length) {
  alert('在iframe中');
}
//方式三
if (self != top) {
alert('在iframe中');
}

禁止頁面被別人iframe

<script language="javascript">
if
 
 (top.location != location)
{
top.location.href = location.href;
}
</script>


//或
<script language="javascript">
if(self!=top){top.location.href=self.location.href;}
</script>

注： 這種做法雖簡單，但如果對方用如下招數很容易就被破解了

<iframe src="你的頁面地址" name="tv" marginwidth="0" marginheight="0" scrolling="No" noResize frameborder="0" id="tv" framespacing="0" width="580" height="550" VSPACE=-145 HSPACE=-385></iframe>
<script language="javascript">
var
 
 location="";
var navigate="";
frames[0].location.href="";
</script>

當然，萬能的js依舊設計了應對招數

<script language="javascript">if(top != self){location.href = "about:blank"; //也可設定為你自己的URL}</script>

<script language="JavaScript">
try{
　　top.location.hostname;
　　if (top.location.hostname != window.location.hostname) {
　　　　top.location.href =window.location.href;
　　}
}
catch(e){
　　top.location.href = window.location.href;
}
</script>