Modal Bootstrap
$('.modal').addClass('modal-wide');
$(".modal-wide").on("show.bs.modal", function() {
var height = $(window).height() - 200;
$(this).find(".modal-body").css("max-height", height);
});
.modal.modal-wide .modal-dialog {
width: 90%;
}
.modal-wide .modal-body {
overflow-y: auto;
}