title: What is the most widely-used Javascript graphics library that is the most cross-browser compatible?
body: <p>I know there are tons of great graphics libraries for javascript...</p>
  
  <p>Now, I know that there are other questions asking for graphics library suggestions. But none of them address the following issues:</p>
  
  <ol>
  <li><p>What is the most widely-used javascript-graphics library right now?</p></li>
  <li><p>Can it handle text, rotation, arcs, bezier-style line geometries, and is compatible with at least FF, IE(7/8), Safari, and Chrome...</p></li>
  <li><p>Also, because of my client's fears of required plug-ins that users need to add to their browser, it needs to be something that can load on-the-fly and not require the user to permanently install anything external.</p></li>
  </ol>
  
  <p>Does such an animal exist?</p>
  
  <p>I am looking for your experienced opinion on this one.</p>