Can't get my "onclick" to work.

[Canadian]

I've got the following "onclick" set up to swap the color of a product.  I've had this code work in the past but for some reason it won't work on my new site.  I must be missing something simple.  Any thoughts?

 

Thanks...

 

// This is the main image I'm swapping.  Below are the 10 color selector buttons

<img src="../images/wheel_detail_90_blue.gif" name="90_zoom" id="90_blue" />
      
      <img class="color_selector_left" src="../images/wheel_detail_color_selector_blue.gif" alt="thumb_blue" name="blue" id="blue" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_blue.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_red.gif" alt="thumb_red" name="red" id="red" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_red.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_green.gif" alt="thumb_green" name="green" id="green" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_green.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_orange.gif" alt="thumb_orange" name="orange" id="orange" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_orange.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_yellow.gif" alt="thumb_yellow" name="yellow" id="yellow" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_yellow.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_pink.gif" alt="thumb_pink" name="pink" id="pink" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_pink.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_purple.gif" alt="thumb_purple" name="purple" id="purple" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_purple.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_grey.gif" alt="thumb_grey" name="grey" id="grey" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_grey.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_black.gif" alt="thumb_black" name="black" id="black" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_black.gif',1)" />
      
      <img class="color_selector" src="../images/wheel_detail_color_selector_stealth.gif" alt="thumb_stealth" name="stealth" id="stealth" onclick="MM_swapImage('90_zoom','','../images/wheel_detail_90_stealth.gif',1)" />