A site provide JavaScript Graphics Library

You can see the detail in this site:

http://www.walterzorn.com/jsgraphics/jsgraphics_e.htm

Very cool.

And this function is to change the zoom of the page. You can find it when you doubleclick in the page.

function ZOOM()
{
    if (document.body && document.body.style && typeof document.body.style.zoom != "undefined")
    {
        if (document.body.style.zoom=="400%")
            document.body.style.zoom = "100%";
        else
        {
            document.body.style.zoom = "400%";
            alert('You/'ve doubleclicked on the document./nDoubleclick again to unzoom.');
        }
    }
}
document.ondblclick=ZOOM;