How can i attach an iframe in my Form?

How can i attach an iframe in my Form?

Hello Respected Members of Zoho.

I am in trouble, i want to add an iframe with my form. i am use Add notes field for attach an iframe in form but i seems it doesn't support iframe option.

Like i want to add  iframe in my form. So users didn't go anywhere for getting any information, also in another window or another page they get their information in my form.
just take an example of iframe option:-
<iframe src="http://www.w3schools.com/" width="100%" height="300"></iframe>

Please provide me solution how can i achieve this.
Thanks in advance!

Mark