I'm trying to load a SVG with Javascript. I did it quite often with success, but this time it has a strange return.

Here is my JS

var xmlns = 'http://www.w3.org/2000/svg';
var container = document.getElementById('svgContainer');
var svg = document.createElementNS(xmlns, 'svg');
svg.setAttribute('xmlns', xmlns);
svg.setAttribute('version', '1.2');
var defs = document.createElementNS(xmlns, 'defs');
var lg = document.createElementNS(xmlns, 'linearGradient');
lg.setAttribute('id', 'lg');
defs.appendChild(lg);
var stop1 = document.createElementNS(xmlns, 'stop');
stop1.setAttribute('offset', '0');
stop1.setAttribute('style', 'stop-color:#ffffff;stop-opacity:1');
lg.appendChild(stop1);
var stop2 = document.createElementNS(xmlns, 'stop');
stop2.setAttribute('offset', '1');
stop2.setAttribute('style', 'stop-color:#000000;stop-opacity:1');
lg.appendChild(stop2);
var rg = document.createElementNS(xmlns, 'radialGradient');
rg.setAttribute('cx', '171.20810');
rg.setAttribute('cy', '196.85463');
rg.setAttribute('r', '200.00000');
rg.setAttribute('fx', '171.20810');
rg.setAttribute('fy', '196.85463');
rg.setAttribute('id', 'rg');
rg.setAttribute('xlink:href', '#lg');
rg.setAttribute('gradientUnits', 'userSpaceOnUse');
rg.setAttribute('gradientTransform', 'matrix(1.040418,0.796229,-0.814518,1.064316,153.4218,-150.4353)');
defs.appendChild(rg);
svg.appendChild(defs);
var g = document.createElementNS (xmlns, 'g');
g.setAttribute('transform', 'scale(0.2,0.2)');
svg.appendChild(g);
container.appendChild(svg);
var path = document.createElementNS (xmlns, 'path');
path.setAttribute('d', 'M 450.00000 255.00000 A 200.00000 205.00000 0 1 1  50.000000,255.00000 A 200.00000 205.00000 0 1 1  450.00000 255.00000 z');
path.setAttribute('style', 'opacity:1.0000000;fill:url(#rg);fill-opacity:1.0000000;fill-rule:evenodd;stroke:none;stroke-width:8.0000000;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1');
g.appendChild(path);

So it generates the perfect HTML DOM elements in the proper order, but it doesn't show anything. When I copy the HTML from the source and paste it, it renders the HTML but not the Javascript, but it's the exact same code.

You can see the source here.

The weird thing is that when I put the radialGradient in the DOM, it works. You can see it in here.

So how should I do this? This problem is on all browsers.

Thank you for your help.