红色箭头显示不出来 文件里有图片

$('.dropdown').hover(function(){

//保存一下$(this),$(this)就是dropdown

var $dropdown = $(this);

$dropdown.find('dropdown-toggle').css({

'background-color':'#fff',

'border-color':'#cdd0d4'

});

$dropdown.find('dropdown-arrow').css({

'background-image':'url(img/dropdown-arrow-active.png)'

});

$dropdown.find('.dropdown-layer').show();

},function (){

var $dropdown = $(this);

$dropdown.find('dropdown-toggle').css({

'background-color':'',

'border-color':'#f3f5f7'

});

$dropdown.find('dropdown-arrow').css({

'background-image':'url(img/dropdown-arrow.png)'

});

$dropdown.find('.dropdown-layer').hide();

});