This is improper use of the image form element type.
an image element does not support a value attribute, and should use a src attribute to set the image source, just like an image tag.
you should not be using CSS to set the background image for the image element type. you should be using the src attribute instead:
<input name="LEDCart_Update_100" id="LEDCart_Update_100" type="image" src="/energy-saving-light-bulbs/icon-refresh.png" class="eC_RefreshButton" align="middle" />