How to pass value to JavaScript function

Here'smy problem. I am trying to pass a value set by a Radio button to a JavaScript function.
Can anyone help I sure there is a simple answer I just having trouble coming up with it.

Do u mean something of this sort--->Here after i type something into the text box and click the radio button,the value in the text box will be displayed in the alert message.
This alert message is inside a function called by the radio button.
Hope this is of use to u(If i have misunderstood your question,please explain it again)
<html>
<script language="javascript">
function fun(str)
{
alert(str);
}
</script>
<body>
<form name="f1">
<input type="text" name="txt" size=20>
<input type="radio" name="r1" value="radio1" onClick="fun(document.f1.txt.value)">
</form>
</body>
</html>
regards,
kichu.
[This message has been edited by kichu kichu (edited May 10, 2001).]

If you mean the actual value of the radio button, I think this should work:
<input type="radio" name="MyRadio" value="cool" onClick="myFunction(this.value)"> Cool