ok what goes on ear?

this error came up from 
http://www.w3schools.com/site/site_validate.asp

that checks using 
http://validator.w3.org/

Line 2407, column 21: 
  "images/blacksq.gif"> comes up
                                ^

and this is the faulty line
[2407]<img alt="the picture" src="images/blacksq.gif"> comes up

and then gives this message
Error: element "IMG" not allowed here; check which elements this element may be contained within (explanation...)

clicking onto explanation gives

"document type does not allow element "FOO" here" 
Straightforward, but not terribly informative. There are a lot of different errors that will generate this error message: 

  a.. Using an unknown tag. In this case, the next error will be "element `FOO' undefined". 
  b.. Using a tag in the wrong place. For instance, <TABLE><TD>blah</TABLE> will cause this error. The trick here is that <TABLE> cannot directly contain <TD>'s; it contains <TR>'s which contain <TD>'s. The above example should be <TABLE><TR><TD>blah</TABLE>. 
  c.. 
------------------------------------------------------------------------------

were does "FOO" come into it? 
more important TABLES the  wrong code is not used in tables.






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