如何实现JavaScript Cascades ..？

我正在阅读“ JavaScript the Good Parts”,它提到级联作为一种在JavaScript中进行方法链接的方法,但我找不到任何解释如何实现这些方法的代码.

getElement('myBoxDiv').
move(350,150).
width(100).
height(100).
color('red').
border('10px outset').
padding('4px').
appendText("Please stand by").
on('mousedown',function (m) {
    this.startDrag(m,this.getNinth(m));
}).
on('mousemove','drag').
on('mouseup','stopDrag').
later(2000,function (  ) {
    this.
        color('yellow').
        setHTML("What hath God wraught?").
        slide(400,40,200,200);
}).
tip('This box is resizeable');