LaTeX for Blogger, requires jQuery

gistfile1.html

<!--
LaTeX for Blogger, requires jQuery

1. Add a HTML/Javascript gadget in the Layout mode and write this code.
2. In the HTML edit mode, write equations as follows:

<div class="equation">
ax^2 + bx + c = 0
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}
</div>

http://code.google.com/apis/chart/infographics/docs/formulas.html
-->
<script type="text/javascript">
$('.equation').each(function(i,e) {
  var arr = new Array();
  var lines = $(this).html().replace(/\r\n|\r|\n/g,'').split(/<br>/i);
  for (var j = 0; j < lines.length; j++) {
    var chl = lines[j].replace(/&gt;/g, ">").replace(/&lt;/g, "<").replace(/&quot;/g, '"').replace(/&amp;/g, "&");
    if (chl)
      arr[j] = '<img src="http://chart.googleapis.com/chart?cht=tx&chl=' + encodeURIComponent(chl) + '" \/>'
  }
  $(this).html(arr.join('<br \/>'));
});
</script>