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JS to get Radio value code detailed

Source: Internet
Author: User
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Put the radio input in the form,

<form name=theform>

<input type=text name=input1 value= "Test" >

<input type=radio name= "a[]" value= "0" checked> option 1
<input type=radio name= "a[]" value= "1" > option 2

</form>

Instance 1

==javascript read the value of radio = =

The code is as follows Copy Code

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 ("Radio box unchecked");
return false;
}
</script>


Instance 2

The user clicks the current radio implementation to read the current radio value

The code is as follows Copy Code

<script type= "Text/javascript" language= "JavaScript" >
function Permissions (obj)
{
var radioss= obj.value
alert (Radioss);
}
</script>
<body>
<input type= "Radio" id= "Radios" name= "radios" value= "0" onclick= "Permissions (This)" >admin
<input type= "Radio" id= "Radios" name= "Radios" value= "1" onclick= "Permissions (This)" >user


Instance 3

= = Set Radio which is selected = =

The code is as follows Copy Code

<script>

function Setradio (v)
{
Robj=document.form1.radioname;
for (i=0;i<robj.length;i++) {
if (robj[i].value==v) {
Robj[i].checked=true;
}
}
}
</script>

Edit summary:
The most important thing we see is

The code is as follows Copy Code
if (formobj.a[i].checked) {
Alert ("Select box selected: + Formobj.a[i].value");
return true;
}

FORMOJB is the name of the form we want to define, this must be the same as in JS, and then A is our multiple radio named a[] This form, a[i] refers to the radio of the first few Formobj.a[i].value The key to this is to get the value in the Formobj.a[i].value.

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Related Keywords:
js get input value how to get value how to get absolute value how to get textarea value how to get array value in javascript how to get ascii value in python how to get jquery value in php

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