Use GET parameter "color" with an hex value to change the fill in an SVG file

check.svg

<svg width="255px" height="170px" xmlns="http://www.w3.org/2000/svg">
  <g>
    <path d="M0,43 L42,0 L126,84 L211,0 L254,43 L169,127 L127,170 L84,127 L0,43 L0,43 Z"/>
  </g>
  <script type="application/ecmascript"> <![CDATA[
    var href,
        paramList,
        arg,
        color = '#000';

    href = document.defaultView.location.href;
    if ( -1 != href.indexOf("?") )
    {
      paramList = href.split("?")[1].split(/&|;/);
      for ( p in paramList )
      {
        arg = paramList[ p ].split("=");
        if( arg[0] = 'color' && arg[1].match(/^#[a-f0-9]{3}([a-f0-9]{3})?$/i))
        {
          document.getElementsByTagName( 'path' )[0].setAttribute('fill', arg[1]);
        }
      }
    }
  ]]> </script>
</svg>