获取图片宽和高

// 获取图片宽和高

    var getPicSize = function (path) {

        if(!path){
            return null;
        }

        var size = {
            width: 0,
            height: 0
        };
        var image = new Image();
        image.src = path;
        size.width = image.width;
        size.height = image.height;
        return size;
    }