<html>
<head>
<script type="text/javascript">
function checkedAll(totalchecks)
{
for(i=1;i<=totalchecks;i++)
{
document.getElementById('check'+i).checked=documen t.getElementById('checkall').checked;
if (document.getElementById('check'+ i).checked==true)
{
document.getElementById('text'+ i).value=i;
}
else
{
document.getElementById('text'+i).value=0;
}
}
}
function calcular(totalchecks,id)
{
if (document.getElementById(totalchecks+id).checked== true)
{
document.getElementById('text'+id).value=id;
}
else
{
document.getElementById('text'+id).value=0;
}
}
</script>
</head>
<body>
<?
$totalcheck="4";
?>
<form action="respueta.php" method="post" name="uno" id="uno">
<p>
<input name="uno" type='checkbox' id="check1" onclick='calcular("check","1")'/>
Cambia Value del checkbox:
<input name="uno" type="text" id="text1" />
<br />
<input name="dos" type='checkbox' id="check2" onclick='calcular("check","2")'/>
Cambia value del checkbox:
<input name="dos" type="text" id="text2" />
<br />
<input name="tres" type='checkbox' id="check3" onclick='calcular("check","3")'/>
Cambia Value del checkbox:
<input name="tres" type="text" id="text3" />
<br />
<input name="tres" type='checkbox' id="check4" onclick='calcular("check","4")'/>
Cambia Value del checkbox:
<input name="tres" type="text" id="text4" />
<br />
<label>
<input name="submit" type="submit" id="submit" value="Enviar" />
</label>
</p>
<input type='checkbox' name='checkall' id="checkall" onclick='checkedAll(<?echo $totalcheck?>);'/>
</form>
</body>
</html>