var slider = $('.slider');     
var timer;    

 $(window).on('load resize',function(){         
    clearTimeout( timer );          
    timer = setTimeout( sliderResponsive(), 100 ); 
})       
function sliderResponsive(){         
    if($(window).width() < 767){             
        slider.filter('.slick-initialized').slick('unslick');         
    }else{             
        slider.not('.slick-initialized').slick({                
            arrows: true,                
            slidesToShow: 1,                 
            slidesToScroll: 1            
        });                         
    }       
}