[VE][76] Error Message Feedback

Hello,
wich tag can i use insteadof the <u>...</u>? If i use the the <div
class="underline">...</div> tag and difine in a CSS file: #underline {
text-decoration:underline; } i get following output:
U
nderline
 
insteadof 
 
Underline
 
 
With best reguards,
 
Michael Vogel