<script> function checkC(form){ var ras = document.getElementsByTagName("input"); var len = ras.length; var k = 0, x = 0; for(var i = 0; i < len; i++){ if(ras[i].type == "radio" && ras[i].checked){ if(ras[i].name == "abc")x = 1; k++; } } alert("有" + k + "个被选中，第一个" + (x == 1? "已经": "没有") + "被选中"); return false; } </script><form name="form1" action="ad.php" method="post" onsubmit="return checkC(this)"> <input type="radio" name="abc" checked> <input type="radio" name="bcd"> <input type="radio" name="def"> <input type="radio" name="efg"> <input type="radio" name="fgh" checked> <input type="radio" name="ghi"> <input type="submit" value="提交"> </form>
function test() { var myForm = document.forms["myForm"]; var inputs = myForm.getElementsByTagName("input"); var count = 0; for(var i = 0 ;i<inputs.length;i++) { if(inputs[i].type=="radio"&&inputs[i].checked) { count++; if(count==1)alert("我是第一个被选中的radio"+inputs[i]); } } alert("有"+count+"个radio被选中"); }2楼的没有判断type
谢谢大家的意见,修改出我想要的.<script language="javascript"> function kk() { var formattra=document.form_item; var formattr=formattra.getElementsByTagName("input"); //alert(formattr.length); if(formattr[0].checked==false) { alert("第一项必需选择!"); } var count=0; for(var i=0;i<formattr.length;i++) {
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>财付通付款</title>
</head>
<body>
<form name="funfun" id="funfun" method="post" action="#">
<input type="radio" name="11">
<input type="radio" name="22">
<input type="radio" name="33">
<input type="radio" name="44">
<input type="radio" name="55">
<input type="radio" name="66">
<input type="button" value="tijiao" onclick="javascript:kk();">
</form>
</body>
<script language="javascript">
function kk()
{
var formattr=document.funfun;
// alert(formattr.length);
if(formattr[0].checked==true)
{
alert("第一个被选中");
}
var count=0;
for(var i=0;i<formattr.length;i++)
{
if(formattr[i].checked==true)
{
count++;
}
} if(count>=2)
{
alert("至少2个被选中");
}}</script>
</html>
<script>
function checkC(form){
var ras = document.getElementsByTagName("input");
var len = ras.length;
var k = 0, x = 0;
for(var i = 0; i < len; i++){
if(ras[i].type == "radio" && ras[i].checked){
if(ras[i].name == "abc")x = 1;
k++;
}
}
alert("有" + k + "个被选中，第一个" + (x == 1? "已经": "没有") + "被选中");
return false;
}
</script><form name="form1" action="ad.php" method="post" onsubmit="return checkC(this)">
<input type="radio" name="abc" checked>
<input type="radio" name="bcd">
<input type="radio" name="def">
<input type="radio" name="efg">
<input type="radio" name="fgh" checked>
<input type="radio" name="ghi">
<input type="submit" value="提交">
</form>
function test()
{
var myForm = document.forms["myForm"];
var inputs = myForm.getElementsByTagName("input");
var count = 0;
for(var i = 0 ;i<inputs.length;i++)
{
if(inputs[i].type=="radio"&&inputs[i].checked)
{
count++;
if(count==1)alert("我是第一个被选中的radio"+inputs[i]);
}
}
alert("有"+count+"个radio被选中");
}2楼的没有判断type
function kk()
{
var formattra=document.form_item;
var formattr=formattra.getElementsByTagName("input"); //alert(formattr.length);
if(formattr[0].checked==false)
{
alert("第一项必需选择!");
}
var count=0;
for(var i=0;i<formattr.length;i++)
{
if(formattr[i].type=="radio"&&formattr[i].checked==true)
{
count++;
}
} if(count<2)
{
alert("至少选择2个调查对像");
}
else{
formattra.submit();
}
}</script>不过这种对于像下面,同name的radio,只能判断出第一个.
<input type="radio" name="aa" value="1">
<input type="radio" name="aa" value="2">
<input type="radio" name="aa" value="3">
<input type="radio" name="bb" value="1">
我想要name为aa的都算一个.因为单选,且第一题必需作答.所以name=aa的都要考虑上.
lz威武
不过偶也有个方法
就是elements集合
<script type="text/javascript">
var x=document.formName;
for (var i=0;i<x.length;i++)
{
document.write(x.elements[i].value);
document.write("<br />");
document.write(x.elements[i].type);//可以拿到type
document.write("<br />");
}
</script>
<script type="text/javascript" language="JavaScript" src="JQuery.js"></script> <script type="text/javascript" language="javascript">
function a()
{
var IsCheckCount=0;
$(document.body).find("input[type=radio]").each(function(i){
var IsChecked=$(this).attr("checked");
if(i==0){
if(IsChecked==true){
alert('第一个选中了');
}else{
alert('第一个没选中');
}
}
if(IsChecked==true){
IsCheckCount++;
}
})
if(IsCheckCount<2){
alert('至少选择2个');
}else{
alert('通过验证');
}
}
</script><input id="Radio1" type="radio" />
<input id="Radio2" type="radio" />
<input id="Radio3" type="radio" />
<input id="Button1" type="button" value="button" onclick="a()" />