[Masiello]

Check this to make chatbox W3C Standard

document type does not allow element "table" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag . <table cellpadding="4" cellspacing="1" border="0">

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 "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").