jquery实现点击空白的事件

//点击空白扩展
jQuery.fn.extend({
    clickOther: function() {
        if (window.click_other == null) {
            window.click_other = new Array();
        }
        window.click_other.push({ target: this, func: arguments[0] });
        $(document.body).click(function(e) {
            for (var i = 0; i < click_other.length; i++) {
                var item = window.click_other[i];
                var target = item.target;
                if (typeof (target) == "String") target = $(target)[0];

                if (e.target == target) {
                    continue;
                }
                var index = $(e.target).parents().index(target);
                if (index == -1) {
                    item.func();
                }
            }
        });

    },
    unClickOther: function() {
        if (window.click_other == null) {
            return;
        }
        for (var i = 0; i < window.click_other.length; i++) {
            var item = window.click_other[i];
            if (item.target == this) {
                window.click_other.splice(i, 1);
            }
        }
    }
}); 

//点击空白扩展
jQuery.fn.extend({
    clickOther: function() {
        function isInside(e, target) {
            var x = e.pageX;
            var y = e.pageY;
            var left = target.offset().left;
            var width = target.width();
            var top = target.offset().top;
            var height = target.height();

            if (x > left && x < left + width && y > top && y < top + height) return true;
            return false;
        }
        if (window.click_other == null) {
            window.click_other = new Array();
        }
        this.except = null;
        var func = arguments[0];
        if (typeof (func) == "string") {
            this.except = document.getElementById(func);
            func = arguments[1];
        }
        window.click_other.push({ target: this, func: func });
        $(document).click(function(e) {
            for (var i = 0; i < click_other.length; i++) {
                var item = window.click_other[i];
                var target = $(item.target);
                if (isInside(e, target)) continue;
                if (item.target.except) {
                    var except = $(item.target.except);
                    if (isInside(e, except)) continue;
                }
                item.func();
            }
        });

    },
    unclickOther: function() {
        if (window.click_other == null) {
            return;
        }
        for (var i = 0; i < window.click_other.length; i++) {
            var item = window.click_other[i];
            if (item.target == this) {
                window.click_other.splice(i, 1);
                break;
            }
        }
    }
});