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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 input value in javascript how to get value of x how to get array value in javascript

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