Výpis šachovnice

  <script>
  function CreateTable(amount,size,col1,col2)
  {
    var table = document.createElement("table");
    table.cellPadding="0";
    table.cellSpacing="0";
    table.style.cssText = "width:"+(amount*size)+"px;height:"+(amount*size)+"px;";
    var row,col,bgcol;
    for(var r=0,bg=0;r<amount;r++,bg++)
    {
      if(!bg){bgcol=col1;}else{bgcol=col2;bg=-1;}
      row = document.createElement("tr");
      for(var c=0,bg2=0;c<amount;bg2++,c++)
      {
        if(!bg){if(!bg2){bgcol=col1;}else{bgcol=col2;bg2=-1;}}else{if(!bg2){bgcol=col2;}else{bgcol=col1;bg2=-1;}}
        col = document.createElement("td");
        col.style.cssText = "width:"+size+"px;height:"+size+"px;background-color:"+bgcol+";";
        row.appendChild(col);
      }
      table.appendChild(row);
    }
    document.body.appendChild(table);
  }
  </script>

CreateTable(X,Y,COL1,COL2);

 
<script>
  function CreateTable(pocet_radku, pocet_sloupcu,col1,col2)
  {
    var result ="<table cellspacing=0 cellpading=0>";
    var radek = 0, sloupec = 0;
    var color = new Array(col1,col2); // barvy si vlozim do pole ( nebo jako parametr v poli predam) 
    var barva;
    while  ( radek < pocet_radku) {
        // zaciname novy radek 
        barva = color[radek%2];
        result += "<tr>";
        
        sloupec = 0;
        while (sloupec < pocet_sloupcu) {
          // novy sloupec
          barva = color[(radek+sloupec)%2]; // vyhnu se podmince pro urceni barvy
          result += "<td  style='width:20px;height:20px;background-color:"+barva +";'></td>";  
          sloupec++;
        }
        
        result += "</tr>";
        radek++;
    }
    
    result +="</table>";
    return result;     
  }
  </script>

<script type="text/javascript" >
   document.write(CreateTable(10, 20,"red","blue"));
</script>

<form action='' method=get>
Vodorovně: <input type=Text name=X><br>
Svisle: <input type=Text name=Y><br>
<input type=submit value='Načti'>
</form>
<?php
if($_GET[X] and $_GET[Y]){
$Table="<table border=0 cellpadding=0 cellspacing=0>";
for($i=1;$i<=$_GET[Y];$i++){
$Table."<tr>";
  for($j=1;$j<=$_GET[X];$j++){
  $BG_color=(($i-$j)%2) ? "black" : "white";
  $Table.="<td style='background-color:$BG_color;width:60px;height:60px'>&nbsp;</td>";
  }
$Table.="</tr>";
}
$Table.="</table>";

echo $Table;
}
?>