title: Need a full screen background image to contain hyperlink
body: <p>I have a landing page for a website that uses a full screen background image.  I need the "Enter Site" portion of the image to be clickable into the main site.  I tried using image map code, but the dimensions don't work properly on larger monitors.  Is there a way to make a full screen background image contain a clickable hyperlink so they can click anywhere on the page to enter?  Here's my current HTML:</p>
  
  <pre><code>&lt;body topmargin="0" leftmargin="0" rightmargin="0" bottommargin="0"&gt;
  &lt;img alt="full screen background image" src="Dock-BG-ES.gif" id="full-screen-background-image"&gt;
  
  &lt;p&gt;
  &lt;img border="0" src="map.gif" width="1440" height="813" usemap="#entermap"&gt;
  
  &lt;map name="entermap"&gt;
  &lt;area shape="rect" coords="730,560,1200,815" alt="Enter Site" href="welcome.htm"&gt;
  &lt;/map&gt;
  &lt;/p&gt;
  
  &lt;/body&gt;
  </code></pre>
  
  <p>And CSS:</p>
  
  <pre><code>html, body {
  overflow: hidden;
  height: 100%;
  width: 100%;
  padding: 0;
  margin: 0;
  }
  
  #full-screen-background-image {
  z-index: -999;
  min-height: 100%;
  min-width: 1024px;
  width: 100%;
  height: auto;
  position: fixed;
  top: 0;
  left: 0;
  }
  </code></pre>