js/OverlayScrollbars.js
function(event) {
                if(event.preventDefault && event.cancelable)
                    event.preventDefault();
                else
                    event.returnValue = false;
            }
function(event) {
                if(event.preventDefault && event.cancelable)
                    event.preventDefault();
                else
                    event.returnValue = false;
            }
function ( event ) { if ( event . preventDefault && event . cancelable ) event . preventDefault ( ) ; else event . returnValue = false ; }
Prevents the default action of the given event.
@param event The event of which the default action shall be prevented.
Prevents the default action of the given event .