cannot type in the textbox if radio button is not clicked

[gabz456]

anybody help me with this code?


all i know is there will pop-up a msgbox if you click the radio button without writing in the textbox..

like this

<SCRIPT LANGUAGE="VBSCRIPT">  sub gabz () dim name  number = document.form1.Number.value name = document.form1.Name.value  if name="" or number="" then msgbox "you must enter anything in the textbox!",16 end if end sub  </script>

pls..i just want to know the codes that there will pop-up msg saying you must click the radio button so that you can write in the txtbox..vbscript pls