return;
}
if ( handler === false ) {
handler = returnFalse;
} else if ( !handler ) {
return;
}
var elemData = dataManager.data( elem ),
events = elemData.events,
eventHandle = elemData.handle,
types = types.split(” “);
if ( !events ) {
elemData.events = events = {};
}
if ( !eventHandle ) {
elemData.handle = eventHandle = function ( e ) {
return evtHandle.call( eventHandle.elem, e );
};
}
eventHandle.elem = elem;
var type, i = 0;
while ( type = types[i++] ) {
var handleObj = {handler : handler, data : data},
handlers = events[type];
if ( !handlers ) {
handlers = events[type] = [];
addListener( elem, type, eventHandle );
}
handlers.push( handleObj );
}
elem = null;
}
function evtHandle ( event ) {
event = fixEvent( event || window.event );
var handlers = ((dataManager.data(this, “events”) || {})[event.type] || []).slice(0);
event.currentTarget = this;
for( var j = 0, l = handlers.length; j < l; j++ ) {
var handleObj = handlers[j];
event.handler = handleObj.handler;
event.data = handleObj.data;
event.handleObj = handleObj;
var ret = handleObj.handler.call( this, event );
if( ret !== undefined ) {
if( ret === false ) {
event.preventDefault();
event.stopPropagation();
}
}
if( event.isImmediatePropagationStopped() ) {
break;
}
}
}
function removeEvent( elem, types, handler ) {
// don’t do events on text and comment nodes
if( elem.nodeType === 3 || elem.nodeType === 8 ) {
return;
}
if( handler === false ) {
handler = returnFalse;
}
var type, origType, i = 0, j,
elemData = dataManager.data( elem ),
events = elemData && elemData.events;
if( !elemData || !events ) {
return;
}
// Unbind all events for the element
if( !types ) {
types = types || “”;
for ( type in events ) {
removeEvent( elem, type );
}
return;
}
// Handle multiple events separated by a space
// jQuery(…).unbind(“mouseover mouseout”, fn);
types = types.split(” “);
while( (type = types[ i++ ]) ) {
origType = type;
handleObj = null;
eventType = events[ type ];
if( !eventType ) {
continue;
}
if( !handler ) {
for ( j = 0; j < eventType.length; j++ ) {
handleObj = eventType[ j ];
removeEvent( elem, origType, handleObj.handler );
eventType.splice( j–, 1 );
}
continue;
}
for( j = 0; j < eventType.length; j++ ) {
handleObj = eventType[ j ];
if( handler === handleObj.handler ) {
// remove the given handler for the given type
eventType.splice( j–, 1 );
}
}
}
// remove generic event handler if no more handlers exist
if ( eventType.length === 0 ) {
delete events[ origType ];
}
// Remove the expando if it’s no longer used
if ( isEmptyObject( events ) ) {
