The blur() method removes the focus from a check box.
<html> <script language="JavaScript"> <!-- function removeFocus() { document.myForm.checkBox2.blur(); } --> </script> <form name="myForm"> I hold my focus after a click <input type="checkbox" name="checkBox1"><br> I cannot hold my focus after a click <input type="checkbox" name="checkBox2" onClick="removeFocus()"> </form>