Block tags (ie: div) are not allowed inside element tags (ie: span).

Code: 
<span><div></div></span>
That will not validate, since the "rule" is: block tags wrap element tags, not the other way around.
el_jentel1 Reviewed by el_jentel1 on . XHTML Validate? Hello Friends, Please give me XHTML Validate code for <div id="livezilla_tracking"></div> Rating: 5