rn this;
		},

		remove : function(str) {
			alert("remove", str);

			return this;
		}
    };
    
    box.fn.init.prototype = box.fn;
    
    window.box =box;
})();

var testBox = box();
testBox.add("jQuery").remove("jQuery");
```

#### HTML 代码 HTML codes

```html
<!DOCTYPE html>
<html>
    <head>
        <mate charest="utf-8" />
        <meta name="keywords" content="Editor.md, Markdown, Editor" />
        <title>Hello world!</title>
        <style type="text/css">
            body{font-size:14px;co