colspan et rowspan n'existent pas en css...
Voici un petit script pour y remédier
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Nouvelle page 1</title>
 
<script type='text/javascript'>
function init(){
	tabtds=document.getElementsByTagName('td')
	var i=-1;
	while(tabtds[++i]){
		spanrule=/((row)|(col))span(\d+)/.exec(tabtds[i].className)
		if (spanrule){
		     switch(spanrule[1]){
		      	case ("row"): 	tabtds[i].rowSpan=spanrule[4];
	   			  				  	break;
	   	  		case ("col"): 	tabtds[i].colSpan=spanrule[4];
     		}
 
	 	}
	 }
}
</script>
</head>
<body onload="init()">
<table border="1" width="100%">
  <tr>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="colspan2">&nbsp;</td>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="rowspan2">&nbsp;</td>
    <td  class="colspan2">&nbsp;</td>
  </tr>
  <tr>
    <td  class="colspan2">&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
  </tr>
  <tr>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
  </tr>
  <tr>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
  </tr>
  <tr>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
  </tr>
</table>
 
</body>
 
</html>
ça permet juste de tout gérer pas le class plutot que d'avoir un attribut séparé ...