how to judge a page is in a iframe use javascript?

Question

i use javascript to judge a page is in a iframe:

if (this != top) {
    alert("true");
}

enter image description here

but i get "true" all the time,even if not in a iframe(as up picture),who can help me?

[An old question of possible interest.](http://stackoverflow.com/questions/958997) — Pointy, Apr 03 '12 at 15:19
Or possibly [this](http://stackoverflow.com/questions/925039/detect-iframe-embedding-in-javascript). — Surreal Dreams, Apr 03 '12 at 15:20

score 4 · Accepted Answer · answered Apr 03 '12 at 15:20

4

Try

if (self != top) {
    alert("true");
}

answered Apr 03 '12 at 15:20

Dennis

1 Answers1