The onClick attribute of the Table Data tag is not supported... hjælp

Error The onClick attribute of the Table Data tag is not supported.
Netscape Navigator 4.0
line 183 <td bgcolor=\"#999999\" onClick=\"location.href=\'index.htm\';\" onMouseOver=\"co(this,\'in\');\" onMouseOut=\"co(this,\'out\');\">
also lines 195, 205, 217, 231, 241, 253, 267, 277
Error The onMouseOut attribute of the Table Data tag is not supported.
Netscape Navigator 4.0
line 183 <td bgcolor=\"#999999\" onClick=\"location.href=\'index.htm\';\" onMouseOver=\"co(this,\'in\');\" onMouseOut=\"co(this,\'out\');\">
also lines 195, 205, 217, 231, 241, 253, 267, 277
Error The onMouseOver attribute of the Table Data tag is not supported.Netscape Navigator 4.0

nogle der har en ide til hvordan vi kan vi det til at virke med netscape... det er til en menu www.fiskesortering.dk