Question

For example, user clicked link in iframe and i want in parent.html to show spinner. And i have cross domain iframe.

Answer 1

bind the click event of any element from the iframe to an event handler in the parent.
Using jquery:

UPDATE:

suppose in the parent you have the following function:

var clickHandler = function() {
    alert('Link in iframe clicked');
}

and your iframe contains a link with the class “LinkInIframe”, just do this in the iframe:

$('a.LinkInIframe').click(function(e) {
    parent.clickHandler()
};