Radio Button Handling

function get_radio_value()
{
for (var i=0; i < document.form1.group.length; i++)
{
if (document.form1.group[i].checked)
{
var rad_val = document.form1.group[i].value;
alert(rad_val);
}
}

}

function get_radio_value2()
{ alert("1");
for (var i=0; i < document.getElementsByType("radio").length; i++)
{alert("2");
if (document.getElementByName("group").checked)
{
alert("3");
var rad_val = document.getElementByName("group").value;

alert(rad_val);
}
}

}

function get_radio_value3(radioVal) {
alert(radioVal);

}