Hi all,
I noticed while deciding to randomly validate sites (As you do...?) the Colour Picker png is missing an ALT tag @ http://www.w3schools.com/ as @ 1am 29/04/2015 NZST.
Line 807, Column 101: An img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.…ef_colorpicker.asp"><img class="colorpicker" src="/images/colorpicker.png"></a>