Cause back button to close Bootstrap modal windows

backbutton close bootstrap modal

$('div.modal').on('show', function() {
	var modal = this;
	var hash = modal.id;
	window.location.hash = hash;
	window.onhashchange = function() {
		if (!location.hash){
			$(modal).modal('hide');
		}
	}
});

$('div.modal').on('hide', function() {
	var hash = this.id;
	history.pushState('', document.title, window.location.pathname);
});