使用jQuery制作实现点击小图弹出大图代码，点击小图后会自适应弹出适合屏幕比例的大图，带图片放大按钮和关闭按钮，点击图片放大按钮时会显示图片实际尺寸，并且可以自由拖动图片。-Making use jQuery to achieve Click thumbnail to enlarge code pop up, click on the thumbnail will pop up after adaptation for the big screen ratio chart with pictu