if(document.all.r_rule.item(0).checked)
{
document.all.l_rule.style.visibility = "hidden";
}
else
{
if(document.all.r_rule.item(1).checked)
{
document.all.l_rule.style.visibility = "visible";
}
}
{
document.all.l_rule.style.visibility = "hidden";
}
else
{
if(document.all.r_rule.item(1).checked)
{
document.all.l_rule.style.visibility = "visible";
}
}
<script language=javascript>
alert("隐藏");
document.getElementById("ddd").style.display="none";
alert("显示");
document.getElementById("ddd").style.display="block";
</script>