Change text box value of an iframe on a different domain using jQuery?

I have an Iframe for a page that allows pe开发者_StackOverflow中文版ople to sign up for my email newsletters.

I want to auto fill the email field in the iframe based on the querystring url (page.html?email=email)

I know how to do the querystring stuff, I'm just not sure If I'm able to access the input text box within the frame. The form or the textbox neither have id's they only have names.

I've tried the following..

$("email_frame").contents.find('input[name=email]').append("test");

Any help would be great.

If an IFRAME is loaded from a different domain than the main page, the 2 can't interact using JavaScript or CSS.

You may be able to do this by passing the data as

iframe.src = 'otherdomain/frame.html#bob@foo.com'

and using it in the iframe as

window.onload = function ()
{
     data = window.location.hash;
}

for more details read : http://msdn.microsoft.com/en-us/architecture/bb735305.aspx

One trick that I've used to get around these little issues is sending an anonymous function to setTimeout():

var execMe = function() {$("email_frame").contents.find('input[name=email]').append("test");};
var result = setTimeout("execMe", 1000);

Disclaimer: I'm not certain this will work in this circumstance, and it is hacky. Use at your own risk. Just tossing around an idea :)