Something

<?php
$w = 500;
$l = 150;
$str = "<map name=sig  "
for ($y = 0;$y <= $l; $y++;){
for ($x = 0;$x <= $w; $x++;){
$str = $str . "<area shape='rect' coords='$x,$y,$x,$y' href='javascript:XaY($x,$y)'>";
}
}
$str = $str . "</map>";
echo $str;
?>