SVG Gradient turns black when there is a BASE tag in HTML page?

Question

I am using the Raphaël JavaScript Library to create SVG elements in an HTML page and using CodeIgniter as a PHP framework. In the CodeIgniter framework I need to add a

Answer 1

SVG Gradients are defined in the document with a unique id attribute, and then referenced from another element as a URL. Typically the URL is just the identifier fragment, e.g.:

  ...

If you introduce a element with an href attribute, you change the meaning of such URLs in the document. Instead of being computed relative to the current document, they are computed relative to the specified separate URI.