[RESOLVED] How to use Javascript to get the value of a radio button

[chris1990]

I am trying to use Javascript to get the value of a radio button group.

In my code i have this radio group:

<input type="radio" name="Vehicle" value="Car_Single" onchange="SelectFare()"/>
<input type="radio" name="Vehicle" value="Car_Return" onchange="SelectFare()"/>
<input type="radio" name="Vehicle" value="Estate_Single" />
<input type="radio" name="Vehicle" value="Estate_Return" />
<input type="radio" name="Vehicle" value="Exec_Single" />
<input type="radio" name="Vehicle" value="Exec_Return" />
<input type="radio" name="Vehicle" value="Carrier_Single" />
<input type="radio" name="Vehicle" value="Carrier_Return" />
<input type="radio" name="Vehicle" value="Bus_Single" />
<input type="radio" name="Vehicle" value="Bus_Return" />

I am using this Javascript code, but no message box shows:

 function SelectFare() {	
	alert(document.getElementById("Vehicle").value);	 
 }

I also tried this, but it only gives a message box saying undefined.

 function SelectFare() {	
	alert(document.getElementsByName("Vehicle").value);	 
 }

Thanks in advance, Chris1990.