js判断radio是否被选中（一）

<
html >

< head
>

< title
>

votejsp

< /
title >

< script
language =
"javascript" type
= "text/javascript"
>

<!--

function validate(){

var resualt=false;

for(var i=0;i<document.frmvote.radiobutton.length;i++)

{

if(document.frmvote.radiobutton[i].checked)

{

resualt=true;

}

}

if(!resualt)

{

alert(" 为啥不选一个捏~！");

}

return resualt;

}

-->

< /
script >

< /
head >

< body
bgcolor = "#ffffff"
>

< h1
>

关于购房热潮的调查问卷

< /
h1 >

< h3
>

问题1：如今房价居高不下，

< /
h3 >

< form
method = "post"
action =
"voteservlet" name
= "frmvote"
onsubmit =
"return(validate())" >

< br
> < br
>

请选择：< br
/ >

< input
type = "radio"
name =
"radiobutton" value
= "A" /
> A
. 拥有一套货一套以上<
br / >

< input
type = "radio"
name =
"radiobutton" value
= "B" /
> B
. 还没有，不过计划要买<
br / >

< input
type = "radio"
name =
"radiobutton" value
= "C" /
> C. 有这个想法，不过还没有<
br /
>

< input
type = "radio"
name =
"radiobutton" value
= "D" /
> D. 没有这个想法，不买房<
br /
>

< input
type = "submit"
name =
"Submit" value
= "投票" >

< input
type = "reset"
value =
"重新选择" >

< /
form >

< /
body >

< /
html >