Validation Output: 1 Error

Line 12, Column 18: document type does not allow element "center" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag

 
Shopping Maniac
 

The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.

One possible cause for this message is that you have attempted to put a block-level element (such as "

" or "

") inside an inline element (such as "", "", or "