window.open: is it possible open a new window with modify its DOM

Question

I want open a new window：

var my = window.open('iframe.html', '_blank' ,"height=600, width=600");

but just when open it, I want modify its DOM, I have tried:

var div = my.document.createElement("div");
div.innerHTML = "Hello!";
my.document.body.appendChild( div );

or:

var div = $('<div>Hello World</div>');
$(my).contents().find('body').append(div);

Both of them doesn't work;

So is it possible modify my iframe DOM when I open it?

Answer 1

It is possible to access and modify the iframe DOM only before the child window is loaded.

var my = window.open('iframe.html', '_blank' ,"height=600, width=600");

my.onload = function () {
 var div = my.document.createElement("div");
 div.innerHTML = "Hello!";
 my.document.body.appendChild( div );
};

Also, make sure that the parent window is not closed before the child window is loaded.