[HTML] pobierz, plaintext 
<img src="top/banner.gif" alt="Główna" usemap="#mapa" />
 
<map id="mapa">
 
<area shape="rect" coords="34,355,176,389" href="start.html" alt="Strona główna"></area>
 
</map>
[HTML] pobierz, plaintext 

Line 21, column 48: character "#" is not allowed in the value of attribute "usemap"

<img src="top/banner.gif" alt="Główna" usemap="#mapa" />


Line 21, column 48: reference to non-existent ID "#mapa"

<img src="top/banner.gif" alt="Główna" usemap="#mapa" />

This error can be triggered by:
A non-existent input, select or textarea element
A missing id attribute
A typographical error in the id attribute

Try to check the spelling and case of the id you are referring to.