用check实现选择第二个答案告知正确,选择其他告知错误,没有选择告知重新选择,我自己写的代码,但是不出结果,各位大师给看看!
<script language="javascript">
function check(){
var n=0;
for(i=0;i<radio.length;i++)
if(document.form.radio[i].checked==true)
if(i==2)
alert("right");
else
alert("wrong");
else
n++;
if(n==radio.length)
alert("没有选择,重新选择");}
</script>
</head><body>
<form name="form">
1+1=( )
<input type="radio" name="t1" value="1" />a.1
<input type="radio" name="t1" value="2" />b.2
<input type="radio" name="t1" value="3" />c.3
<input type="radio" name="t1" value="4" />d.4
<input type="button" name="submit" value="提交" onclick="check()" />
<input type="reset" name="reset" value="重置" />
</form>
<script language="javascript">
function check(){
var n=0;
for(i=0;i<radio.length;i++)
if(document.form.radio[i].checked==true)
if(i==2)
alert("right");
else
alert("wrong");
else
n++;
if(n==radio.length)
alert("没有选择,重新选择");}
</script>
</head><body>
<form name="form">
1+1=( )
<input type="radio" name="t1" value="1" />a.1
<input type="radio" name="t1" value="2" />b.2
<input type="radio" name="t1" value="3" />c.3
<input type="radio" name="t1" value="4" />d.4
<input type="button" name="submit" value="提交" onclick="check()" />
<input type="reset" name="reset" value="重置" />
</form>
function check(){
var n=0;
var r=document.form1.t1;
for(i=0;i<r.length;i++)
if(r[i].checked==true)
if(i==1)
alert("right");
else
alert("wrong");
else
n++;
if(n==r.length)
alert("没有选择,重新选择");}
</script>
</head><body>
<form name="form1">
1+1=( )
<input type="radio" name="t1" value="1" />a.1
<input type="radio" name="t1" value="2" />b.2
<input type="radio" name="t1" value="3" />c.3
<input type="radio" name="t1" value="4" />d.4
<input type="button" name="submit" value="提交" onclick="check()" />
<input type="reset" name="reset" value="重置" />
</form>
function check(){
var n=0;
var radio=document.form1.t1;
for(i=0;i<radio.length;i++)
if(radio[i].checked==true)
if(i==1)
alert("right");
else
alert("wrong");
else
n++;
if(n==radio.length)
alert("没有选择,重新选择");}
</script>
</head><body>
<form name="form1">
1+1=( )
<input type="radio" name="t1" value="1" />a.1
<input type="radio" name="t1" value="2" />b.2
<input type="radio" name="t1" value="3" />c.3
<input type="radio" name="t1" value="4" />d.4
<input type="button" name="submit" value="提交" onclick="check()" />
<input type="reset" name="reset" value="重置" />
</form>