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function Rectangle(w,h)
{
  this.width=w;
  this.height=h;
}
//¶¨ÒåÒ»¸ö·½·¨
function compute_area()
{
  return this.width*this.height;

}

var page=New Rectangle(8.5,11);
page.area=compute_area;

//µ÷ÓÃз½·¨
var a=page.area();


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new Rectangle.prototype

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<html>
<head>
<meta http-equiv= ......

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C/C++ code:
IHTMLDocument2* pDocument;
GetDHtmlDocument(&pDocument);
IHTMLWindow2* pWindow;
pDocument->get_parentWindow(&pWindow);
VARIANT ret;
ret.vt ......
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