Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as coords.
The coordinates specified for an
<area> element using the
coords attribute are not in a valid format.
For a rectangle (
shape="rect"), the format
X1,Y1,X2,Y2is expected, where the top-left corner is specified by
X1, Y1and the bottom-right corner is specified by
X2, Y2, therefore
X1must be lower than
Y1must be lower than
Y2because the coordinates
0, 0start at the top-left.
For a polygon (
shape="poly"), the format
X1,Y1,X2,Y2,...,Xn,Ynis expected to contain a list of coordinate pairs (at least 3, for a triangle).
For a circle (
shape="circle"), the format
X,Y,Ris expected where
X, Yrepresents the coordinates of the center of the circle (from the top-left corner), and
Ris the radius.
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