title: Differences in using <iframe> and <embed> for displaying SVG and scripting
body: <p>I'm trying to create Dynamic SVG graphics, it is my understanding that the only way to create dynamic SVG is to use a scripting language, so I have a few questions, basically I'd like to load or embed the SVG to a HTML web page and control the graphics using Inputs in the web page, rather than hardcoding the ECMAscript in the SVG file. I'm not entirely sure if I should use the embed tag or an iframe for displaying the SVG here are my doubts regarding SVG and scripting:</p>
  
  <ol>
  <li>Whats the difference (in terms of scripting) in using an <code>&lt;iframe&gt;</code> or and <code>&lt;embed&gt;</code> tag for accessing the SVG elements?, maybe someone can include simple examples.
  <li>Can SVG evaluate math expressions in element attributes(just to be sure)?
  </ol>