print_graphic_2

print_graphic_2.txt

var stars = 600;sk
var sizeVariance = .9; var starSize = 2.5;
var opacityVariance = 1; var w = 2100;
var h = 650;

var g = document.getElementById("group");

for (var i = 0 ; i < stars ; i++){
    var x = getRandomNumber(0,w);
    var y = getRandomNumber(0,h);
    var r = getRandomNumber((starSize - (starSize*sizeVariance)),(starSize + (starSize*sizeVariance)));
    var o = getRandomNumber((1 - opacityVariance),1); g.append(makeStar(x,y,r,o));
}

function makeStar(x,y,r,o){
    var s = document.createElementNS("http://www.w3.org/2000/svg", "circle"); s.setAttribute("cx",x);
    s.setAttribute("cy",y);
    s.setAttribute("r",r);
}

function makeStar(x,y,r,o){
    var s = document.createElementNS("http://www.w3.org/2000/svg", "circle"); s.setAttribute("cx",x);
    s.setAttribute("cy",y);
    s.setAttribute("r",r);
    s.setAttribute("fill","#FFFFFF"); s.setAttribute("fill-opacity",o); return s;
}

function getRandomNumber(min,max){ 
    var dist = max - min;
    return min + (Math.random()*dist); 
}

Thanks this came in pretty handy for a similar need I had.

As an FYI, on line one you have some rogue characters on the end "sk", and you also have two makeStar functions when only the second is required so you can get rid of the first one completely.