JS汎用的な書き方_init

(function(){
	var Modal = {
	    init: function( setting ) {
	        if ( setting != null && setting != undefined && typeof setting === "object" ) {
	            this.data = setting;
	        }
	},

	/*    @opt{object}
	      target{Element}: []
	*/
	    loadrun: function( opt ){
	        console.log(Modal.data.closebtn);
	        console.log(Modal.data.modalb);
	    }};

	    Modal.init({
	        'closebtn': 'aaaa',
	        'modalb': 'bbbb',
	    });

	    Modal.loadrun();
})();