function radioButton(sender, form_name, hidden, value)
 {
 var obj = sender.parentNode.getElementsByTagName('span')[0];

 if (obj.id != 'checked_radio_button')
 {
 var active = document.getElementById('checked_radio_button');
 if (active) active.id = '';

 obj.id = 'checked_radio_button';

 document.forms[form_name].elements[hidden].value = value;
 }
 }
 function radioButton4(sender, form_name, hidden, value)
 {
 var obj = sender.parentNode.getElementsByTagName('span')[0];

 if (obj.id != 'checked_radio_button')
 {
 var active = document.getElementById('checked_radio_button');
 if (active) active.id = '';

 obj.id = 'checked_radio_button';

 document.forms[form_name].elements[hidden].value = value;
 }
 }