var mouse=function(event, delta) {

_imgFrame.unbind("mousewheel", mouse);

if (delta > 0) {

_imgFrame.find(_child+":last").clone().show().prependTo( _imgFrame );

_imgFrame.css("marginLeft",-_width);

_imgFrame.animate( {marginLeft:0}, _speedWheel, '', function(){

_imgFrame.find(_child+":last").remove();

event.stopPropagation();

event.preventDefault();

_imgFrame.bind("mousewheel", mouse);

});

}

};

this is small function which make scroll, but problem in this events dosent work

event.stopPropagation();

event.preventDefault();

why