function slick_equal_heights($slick_slider) {
var stHeight = $($slick_slider).find('.slick-track').height();
$($slick_slider).find('.slick-slide').css('height',stHeight + 'px' );
$(window).on('resize', function(){
$($slick_slider).find('.slick-slide').css('height','auto' );
var stHeight = $($slick_slider).find('.slick-track').height();
$($slick_slider).find('.slick-slide').css('height',stHeight + 'px' );
});
}