Hi,
Give this a try. Here's what i changed.
1. Changed ca_fdGetSelectedOptions to ca_fdGetSelectedOptionValues
2. Removed the third empty parameter from ca_fdUnselectAllOptions as that function only requires two parameters (form id and field id)
3. Removed extra curly brackets from ca_fdUnselectAllOptions
4. Don't forget to replace form_id_value with the id of your form
nodup_dup:function(){
var re = ca_fdGetSelectedOptionValues('form_id_value','tech_contact');
var ve = ca_fdGetSelectedOptionValues('form_id_value','verifier');
if(re == ve){
alert("The technical contact and the change verifier cannot be the same person.\r\nPlease correct before submitting.");
ca_fdUnselectAllOptions('form_id_value','verifier');
ca_fdUnselectAllOptions('form_id_value','tech_contact');
}
},