表单中如何隐藏控件：

Question

<form name=myform>
<input type=radio name=r1 onclick="t2.style.visibility='hidden';t1.style.visibility='visible';">
<textarea id=t1>123</textarea><br>
<input type=radio name=r1 onclick="t1.style.visibility='hidden';t2.style.visibility='visible';">
<textarea id=t2>321</textarea>
</form>

Answer 1

<input type=radio name=myradio onclick="document.all.mytext1.style.display='block';document.all.mytext2.style.display='none'">show1
<input type=radio name=myradio onclick="document.all.mytext2.style.display='block';document.all.mytext1.style.display='none'">show2
<textarea name=mytext1>hello</textarea>
<textarea name=mytext2>welcome</textarea>