The onBlur property notifies you when the focus is removed from a radio button.
<html> <head> <title> Example of the Radio onBlur event handler</title> </head> <body> <script language="JavaScript"> <!-- function showChange(){ document.form1.text1.value = "Focus removed from Radio Button"; } --> </script> <form name="form1"> Click the radio button first, then click in the text area. <br><br> <input type="radio" name=button1 onBlur='showChange()'>Box 1 <br> Click the text box <input type="text" name="text1" size=40> <br> </form> </body> </html>