command to draw circle in javascript

You will need to use SVG to do this which is not widely supported yet. So basically you will need to use images.

Hi,

Use a transparent background circle image in gif or png format and create many image instance with javascript assigned to the smae source. You can even arrange their radius with using a single image given it has the resolution of the largest circle to avoid aliasing and pixelation effects.

Loren Soth

you can use Open-jACOB Draw2D

seen on

greetings

FreeGroup

Why not use Javascript's rounded corners capabilities?

Create a square with css then round the corners to the point that it eventually becomes a circle. This way is all made with code and it's more widely supported than trying to use a png.

Is there a command to draw a circle in javascript or I have to use only a circle picture?

There are a number of good - and free - javascript plot/graph packages.

Also is there a way to arrange many circles randomly in a browser page ,using html/javascript?

Once you have the circles (whether plots or images), yes. They can even be animated.
http://www.dynamicdrive.com/dynamicindex3/bubble.htm

Also get into this plug in processing.js

http://processingjs.org/