[VE][108] Error Message Feedback

Validating http://www.sweetheartsguild.com/pages.php?pages=news
Error [108]: "there is no attribute X"

/Line 71 column 129/: there is no attribute "ONLOAD".

|...gn/menu_banners/banner_4.jpg" onload=*"*initImage('p_mban');" alt="" style="wid|


Hello,
I checked the specification but onload is valid attribute for img and it 
works correctly but validation doesnt.
Could you please help me solve this?
Complete tag is:

<img src="images/design/menu_banners/banner_10.jpg" onload="initImage('p_mban');" alt="" style="width:200px;height:126px;opacity: 0.99999;" class="loadi" id="p_mban">