А исходники jQuery закрыты чтоли?
// Support: IE<9 (lack submit/change bubble), Firefox 17+ (lack focusin event)
// Beware of CSP restrictions ([url]https://developer.mozilla.org/en/Security/CSP[/url]), test/csp.php
for ( i in { submit: true, change: true, focusin: true }) {
div.setAttribute( eventName = "on" + i, "t" );
support[ i + "Bubbles" ] = eventName in window || div.attributes[ eventName ].expando === false;
}
// IE submit delegation
if ( !jQuery.support.submitBubbles ) {
jQuery.event.special.submit = {
setup: function() {
// Only need this for delegated form submit events
if ( jQuery.nodeName( this, "form" ) ) {
return false;
}
// Lazy-add a submit handler when a descendant form may potentially be submitted
jQuery.event.add( this, "click._submit keypress._submit", function( e ) {
// Node name check avoids a VML-related crash in IE (#9807)
var elem = e.target,
form = jQuery.nodeName( elem, "input" ) || jQuery.nodeName( elem, "button" ) ? elem.form : undefined;
if ( form && !jQuery._data( form, "submitBubbles" ) ) {
jQuery.event.add( form, "submit._submit", function( event ) {
event._submit_bubble = true;
});
jQuery._data( form, "submitBubbles", true );
}
});
// return undefined since we don't need an event listener
},
postDispatch: function( event ) {
// If form was submitted by the user, bubble the event up the tree
if ( event._submit_bubble ) {
delete event._submit_bubble;
if ( this.parentNode && !event.isTrigger ) {
jQuery.event.simulate( "submit", this.parentNode, event, true );
}
}
},
teardown: function() {
// Only need this for delegated form submit events
if ( jQuery.nodeName( this, "form" ) ) {
return false;
}
// Remove delegated handlers; cleanData eventually reaps submit handlers attached above
jQuery.event.remove( this, "._submit" );
}
};
}