how to access iFrame parent page using jquery?

To find in the parent of the iFrame use:

$('#parentPrice', window.parent.document).html();

The second parameter for the $() wrapper is the context in which to search. This defaults to document.

how to access iFrame parent page using jquery

window.parent.document.

jQuery is a library on top of JavaScript, not a complete replacement for it. You don't have to replace every last JavaScript expression with something involving $.

If you need to find the jQuery instance in the parent document (e.g., to call an utility function provided by a plug-in) use one of these syntaxes:

• window.parent.$
• window.parent.jQuery

Example:

window.parent.$.modal.close();

jQuery gets attached to the window object and that's what window.parent is.