+ JavaScript の質問用スレッド vol.6 +

<script>
function ooo(y){
if(y.checked){
for(i=1;i<5;i++){document.forms[0].elements[i].disabled="false";}
}else{
for(i=1;i<5;i++){document.forms[0].elements[i].disabled="true";}
}
}
</script>
<form>
<input type="checkbox" onClick="ooo(this)">
<input type="checkbox" disabled>
<input type="checkbox" disabled>
<input type="checkbox" disabled>
<input type="checkbox" disabled>
</form>