Hello there,

I've am trying to make a canvas animation:

var context;
var meter;
var pin;

function init() {
    var meter = new Image();
    var pin = new Image();
    var context = document.getElementById('canvas').getContext('2d');
    meter.src = 'background.png';
    pin.src = 'needle.png';
    context.drawImage(meter,0,0);
    context.translate(275,297);
    context.save();
    setTimeout(startup,500);
}

function startup() {
    var r=2;    // set rpm here.
    var i=r*36-27;
    var angleInRadians = 3.14159265 * i/180;  //converting degree to radian                
    context.rotate(angleInRadians); //rotating by angle
    context.drawImage(pin,-250,-3);  //adjusting pin center at meter center
    context.restore();
}

You can see the script at http://www.kingoslo.com/instruments/

With firebug I get error saying that context is undefined, which I think is strange.

Thanks.

Kind regards, Marius