This is my code and below is the WC3 Errors, thanks so much in advance. ( Source Code ) <td style="text-align: center;"> <iframe src="http://www.Flickr.com/slideShow/ index.gne?user_id=21879932@N02&set_id=72157628761557187" width="500" height="900" scrolling="yes" class="style2" ></iframe> ( WC3 Validation Errors ) Line 103, Column 57: Bad value http://www.Flickr.com/slideShow/ index.gne?user_id=21879932@N02&set_id=72157628761557187 for attribute src on element iframe: Control character in path component.width="500" height="900" scrolling="yes" class="style2" ></iframe> Line 103, Column 57: The scrolling attribute on the iframe element is obsolete. Use CSS instead.width="500" height="900" scrolling="yes" class="style2" ></iframe>