i have a simple font size function as follows which works fine across safari/firefox but does nothing in IE? 

Page is here:  http://bedlam.emrysmedia.com/index.html

code as follows:

2. // Reset Font Size
3.  var originalFontSize = $('#pageContent').css('font-size');
4. $('#reset').bind('click',function() {
5. $('#pageContent').css('font-size', originalFontSize);
6.  });
7.  // Increase Font Size
8.  $('#larger').bind('click',function() {
9. var currentFontSize = $('#pageContent').css('font-size');
10. var currentFontSizeNum = parseFloat(currentFontSize, 10);
11. var newFontSize = currentFontSizeNum*1.2;
12. $('#pageContent').css('font-size', newFontSize);
13. return false;
14.  });
15.  // Decrease Font Size
16.  $('#smaller').bind('click',function() {
17. var currentFontSize = $('#pageContent').css('font-size');
18. var currentFontSizeNum = parseFloat(currentFontSize, 10);
19. var newFontSize = currentFontSizeNum*0.8;
20. $('#pageContent').css('font-size', newFontSize);
21. return false;
22.  });