网页中有多组radio具体数目不详，如何判断所有组都选中才允许提交？

下班前写了个土的楼主可参考
function isCanSubmit(){
   var tags = document.forms[0].getElementsByTagName('input');
for(var i = 0,len = tags.length;i<len;i++){
   var comp = tags[i];
   if(comp.type == 'radio'){
      var radio0 = document.getElementsByName(comp.name)[0];
      var radio1 =document.getElementsByName(comp.name)[1];
      if(radio0.checked != "checked &&  radio1.checked != "checked"){
           return false;
       }
    }
}
return true;}

解决方案 »

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一旦用了JQ，偷懒也会成为一种时尚：<head>
<title>单选按钮验证示例_by_theforever_csdn_net</title>
<script type="text/javascript" charset="utf-8" src="http://jqueryjs.googlecode.com/files/jquery-1.3.min.js"></script>
<script type="text/javascript">
$(function() {
$('#theforever_csdn').click(function(){
if($("input[type=radio]:checked").length==$("input[type=radio]").length)
$('#theforever__csdn').submit();
});
});
</script>
</head>
<body>
<form id="theforever__csdn">
<table border="1">
<tr>
<td><input type="radio" name="i1" value="0" checked>是</td>
<td><input type="radio" name="i1" value="1">否</td>
</tr>
<tr>
<td><input type="radio" name="i2" value="0">是</td>
<td><input type="radio" name="i2" value="1">否</td>
</tr>
<tr>
<td><input type="radio" name="i3" value="0">是</td>
<td><input type="radio" name="i3" value="1">否</td>
</tr>
<input id="theforever_csdn" type="button" value="提交" />
</form>
上面错了，忘了分组的问题。
下面改正了，楼主测试看看：<head>
<title>单选按钮验证示例_by_theforever_csdn_net</title>
<script type="text/javascript" charset="utf-8" src="http://jqueryjs.googlecode.com/files/jquery-1.3.min.js"></script>
<script type="text/javascript">
$(function() {
    $('#theforever_csdn').click(function(){
      //当每组都只有两个选项的时候。
        if($("input[type=radio]:checked").length==$("input[type=radio]").length/2)
            $('#theforever__csdn').submit();
    });
});
</script>
</head>
<body>
<form id="theforever__csdn">
<table border="1">
<tr>
<td><input type="radio" name="i1" value="0" checked>是</td>
<td><input type="radio" name="i1" value="1">否</td>
</tr>
<tr>
<td><input type="radio" name="i2" value="0">是</td>
<td><input type="radio" name="i2" value="1">否</td>
</tr>
<tr>
<td><input type="radio" name="i3" value="0">是</td>
<td><input type="radio" name="i3" value="1">否</td>
</tr>
<input id="theforever_csdn" type="button" value="提交" />
</form>
我最近在做问卷调查，我举的例子radio都是只有两个选项不算难，实际的问卷是有的是两个选项，有的是三个选项，这岂不是很麻烦
<html>
<body>
<form>
<table border="1">
<tr>
<td><input type="radio" name="i1" value="0">是</td>
<td><input type="radio" name="i1" value="1">否</td>
</tr><tr>
<td><input type="radio" name="i2" value="0">是</td>
<td><input type="radio" name="i2" value="1">否</td>
</tr><tr>
<td><input type="radio" name="i3" value="0">是</td>
<td><input type="radio" name="i3" value="1">否</td>
<td><input type="radio" name="i3" value="2">无</td>
</tr>
</table>
</form>
<input type="button" value="click me" id="btn" /><script>
document.getElementById('btn').onclick = function(){
var trs = document.getElementsByTagName('tr'),
len = trs.length,count = 0;

for(var i = 0; i < len; i++){
var inputs = document.getElementsByName('i'+(i+1)),ilen= inputs.length;

for(var j = 0; j < ilen; j++){
if(inputs[j].checked){
count++;
}
}
}

if(count == len){
alert('每项都选了');
}else{
alert('请选择')
}
};
</script>
</body>
</html>楼主用这个，不管每个选项题有多少选项都OK~·
<html>
<head>
<script type="text/javascript">
window.onload = function() {
document.getElementsByTagName('form')[0].onsubmit = function() {
var obj = this.getElementsByTagName('input');
var _F = {};
for(var i = 0; i < obj.length; i ++) {
if (obj[i].type.toLowerCase() == 'radio') {
var n = obj[i].name;
if (typeof(_F[n]) == 'undefined') _F[n] = false;
if (obj[i].checked) _F[n] = true;
}
}
for(x in _F) {
if (!_F[x]) {
alert('每组都要选');
return false;
}
}
return true;
}
}
</script>
</head>
<body>
<form>
<table border="1">
<tr>
<td><input type="radio" name="i1" value="0">是</td>
<td><input type="radio" name="i1" value="1">否</td>
</tr><tr>
<td><input type="radio" name="i2" value="0">是</td>
<td><input type="radio" name="i2" value="1">否</td>
</tr><tr>
<td><input type="radio" name="i3" value="0">是</td>
<td><input type="radio" name="i3" value="1">否</td>
</tr>
</table>
<input type="submit" />
</form>
</body>
</html>
算法：页面中被选中的Radio个数，必需等于Radio组数
要是checkbox、text等类型都有呢，象问卷调查那种，该怎么判断每个题都作了选择啊！本人正学习中。