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JS gets the value of radio

Source: Internet
Author: User
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In fact, the value of JS to get Radio is very simple, if it is a radio button group to traverse the line, if the radio is directly judged. Value on the line.

<!doctype HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd" >
<html xmlns= "http://www.w3.org/1999/xhtml" >
<head>
<meta http-equiv= "Content-type" content= "HTML; charset=gb2312 "/>
<TITLE>JS Get Radio Value </title>
<script>
function Radiogroup ()
{

        for (var i=0;i<formobj.a.length;i++) {  
            if (formobj.a[i].checked) {
              Alert ("Select box selected:" + formobj.a[i].value);
             return true;
           }
       }
        alert ("Unchecked");
        return false;
       }
</script>
Instance two

<script>
function Search (obj)
{
var Urlparam
For (I=0;i<obj.getelementsbytagname ("input"). length-1;i++)
{
if (Obj.getelementsbytagname ("input") [i].checked)
{
Urlparam=obj.getelementsbytagname ("input") [I].value
Break
}
}
obj.action+= "&sjprice=" +urlparam
return True
}
</script>

</head>

<body>
<form id= "form" name= "form" method= "POST" action= ""
  <p>
     <LABEL>
      <input type= "Radio" name= "radiogroup1[" "value=" 1 "id=" Radiogroup1_0 "/>
      Radio </label>
    <br/>
    <label>
      <input type= "Radio" name= "radiogroup1[" Value= "1" id= "Radiogroup1_1"/>
      Radio </label>
    <br />
    <label>
      <input type= Radio "Name=" Radiogroup1[] "value=" 1 "id=" radiogroup1_2 "/>
      Radio </label>
     <br/>
    <label>
      <input type= " Radio "Name=" radiogroup1[] "value=" 1 "id=" radiogroup1_3 "/>
    &nbsP; Radio </label>
  </P>
  <p>
    <input type= button "Name=" Button "id=" button "value=" detect "  onclick=" Web effects: Radiogroup ();/>
    <br/>
  </p>
</form>
</body>
</html>
Method Three

A section of JS get radio a set of selected values of the code, issued to share with you!

Preview function
var colorid= "";
function Showtemp ()

{
var eless = document.getelementsbyname ("Colorstyle");
for (Var i=0;i<eless.length;i++)

{
alert (eless[i].checked+eless[i].name+eless[i].id);
if (eless[i].checked)

{
Colorid=eless[i].value;
Break;
}
}
Alert (colorid+ "-");
}
Method Four, a complete example

<script lanage= "JavaScript" >
function Isid ()
{
alert (Document.all.gender.value);
if (document.all.gender.value= ' new ')
{
Eval ("document.all.emp.style.display= ' block ')"
return false;
}else
{
Eval ("document.all.emp.style.display= ' None")
return true;
}
}

Function foo ()
{
    var selectedindex =-1;
    var Form1 = document.getElementById ("Form1");
    var i = 0;
   
    for (i=0 i<form1.gender.length; i++)
    {
        if (form1.gender[i].checked)
         {
            selectedindex = i;
             alert ("The value of your selected item is:" + form1.gender[i].value);
            break;
       }
   }
   
    if (SelectedIndex < 0)
    {
         alert ("You have not selected any items");
   }
}
</script>
<bodY>
<form method= "POST"
  <table>
  <tr><td>
  <input type = "Radio" value= "new"/>
    employee
    <input type= "Radio" value= "old" checked = "Checked"/>
    old employee
  <input type= "text"/>
  </td>
  < /tr>
  </table>
</form>

</body>
</html>

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