simple jQuery number input imitator

inputNumberize.js

//  simple jQuery input[type='number'] imitator
//  with callback on number change
//
//  supposed markup:
//  <div class="elemnt">
//    <input type="text" class="target" />
//    <span class="arr more"></span>
//    <span class="arr less"></span>
//  </div>
$.fn.inputNumberize = function(options) {
	var settings = $.extend({
		gt: 0,
		lt: false,
		target: "input",
		callback: function() {}
	}, options );

	this.each(function() {
		var obj = $(this);

		var new_count = parseInt(obj.find(settings.target).val());
		if (isNaN(new_count)) new_count = settings.gt;
		if (new_count < settings.gt) new_count = settings.gt;
		if (settings.lt && new_count > settings.lt) new_count = settings.lt;
		obj.attr("data-count", new_count);
		obj.find(settings.target).val(new_count);

		obj.off("focusout", obj.find(settings.target))
			.on("focusout", obj.find(settings.target), function (e) {
			var new_count = parseInt(obj.find(settings.target).val());
			if (isNaN(new_count)) new_count = settings.gt;
			if (new_count < settings.gt) new_count = settings.gt;
			if (settings.lt && new_count > settings.lt) new_count = settings.lt;
			obj.attr("data-count", new_count);
			obj.find(settings.target).val(new_count);
		});

		obj.off("click", ".arr")
			.on("click", ".arr", function (e) {
			e.preventDefault();

			var dir = 1;
			if ($(this).hasClass("less")) dir = -dir;
			
			var cur_count = parseInt(obj.find(settings.target).val());
			if (!cur_count || isNaN(cur_count)) cur_count = settings.gt;
			var new_count = cur_count + dir;
			
			if (new_count < settings.gt) new_count = settings.gt;
			if (settings.lt && new_count > settings.lt) new_count = settings.lt;
			obj.attr("data-count", new_count);
			obj.find(settings.target).val(new_count);

			settings.callback.call(obj, [new_count]);

		});
	});
}