I used to have this for a button:
<img class="left" src="<?php echo $this->webroot."img/arrowleft.png";?>" width="32" height="31" alt="Arrow left button" />
Now I want to use this:
<img class="left" />
Then with CSS I can put a background image, define the size of the button and do everything that I want 100% with CSS. But I was wondering if it is acceptable and according to proper HTML coding standards to have
<img> simply with a class and with no properties at all.