var ho=document.getElementsByName("hobby"); switch(j){ case 1: ho[0].checked=true; break; ase 2: ho[1].checked=true; break; case 3: ho[2].checked=true; break; case 4: ho[3].checked=true; break; case 5: ho[4].checked=true; break; case 6: ho[5].checked=true; break; default: }
switch(j)
{
case "1":
var hobby = document.getElementById("hobby1");
if (false == hobby.checked)
{
hobby.checked = true;
}
break;
case "2":
var hobby = document.getElementById("hobby2");
if (false == hobby.checked)
{
hobby.checked = true;
}
break;
case "3":
var hobby = document.getElementById("hobby3");
if (false == hobby.checked)
{
hobby.checked = true;
}
break;
case "4":
var hobby = document.getElementById("hobby4");
if (false == hobby.checked)
{
hobby.checked = true;
}
break;
case "5":
var hobby = document.getElementById("hobby5");
if (false == hobby.checked)
{
hobby.checked = true;
}
break;
case "6":
var hobby = document.getElementById("hobby6");
if (false == hobby.checked)
{
hobby.checked = true;
}
break;
default:
var j = document.getElementById("wb");
j.value="";
j.placeholder="请输入1-6之间的数字";
alert("请输入1-6之间的数字");
break;
}当然可以了。
ase 2 这里少了一个子母C