Global variable in javascript not working properly

Question

I have an iframe issue ( little bit strange for me ) . The issue is that i have an iframe in my document, and there are several functions are operating different task on that iframe and for accessing the contents of iframe we use :

$("iframe").contents();

So instead of writing this long statement i used a global variable :

var i = $("iframe").contents();

But this is not working well, like

alert( i.find("someelement") );

=> undefined

alert($("iframe").contents().find("someelement")

=> [object]

Whats the problem here?

paste your complete code like where have you declared i

user1432124
– user1432124

2012-06-08 07:10:43 +00:00
Commented Jun 8, 2012 at 7:10 — user1432124
– user1432124, Commented Jun 8, 2012 at 7:10

Praveen Kumar Purushothaman · Accepted Answer · 2012-06-08 07:12:24Z

1

Replace

var i = $("iframe").contents();

with

window.i = $("iframe").contents();

As i has a lesser scope than window, which is used to declare global variables in JavaScript.

But one more thing is, you cannot modify any items inside the iframe, if it is from a different domain. Hope this helps.

answered Jun 8, 2012 at 7:12

Praveen Kumar Purushothaman

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Niet the Dark Absol · Accepted Answer · 2012-06-08 07:09:42Z

0

You are probably overwriting i somewhere, or it's not global. To ensure it's global, don't use var. Instead, define window.i = ...; and always refer to window.i. This avoids possible confusion with a local variable (which can happen quite often given that i is almost always used as an iterator variable). Also make extra sure you always declare i as local if you're using it for anything but the iframe (such as the aforementioned iterator).

answered Jun 8, 2012 at 7:09

Niet the Dark Absol

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Comments

Fab V. · Accepted Answer · 2012-06-08 07:11:36Z

0

Is the content of your iframe on the same domain as the page where it is interted ?

More: http://en.wikipedia.org/wiki/Same_origin_policy

answered Jun 8, 2012 at 7:11

Fab V.

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