Problème validation W3C

Line 52, Column 53: document type does not allow element "h2" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag .

			<p><h2 onmouseover='javascript:montre("smenu2");' > Générer des Serials </h2></p>

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>").

<p><h2 onmouseover='javascript:montre("smenu2");' > Générer des Serials </h2></p>