how to make a field read only based on Logged in user

[ursnani]

I have a Field on my form and I want ti make that field READONLY based on Logged in user.

It should be editable to only 4 users.

I have tried scripting in UI Policy and Onload Client Script, But both are not working.

UI Policy Script:

if(g_user.userName != 'username' || g_user.userName != 'username'){

g_form.setReadOnly('fieldname', true);

Onload SCript:

function onLoad() {

    //Type appropriate comment here, and begin script below

    alert('the current Logged in user is '+g_user.userName);

var ga = g_user.userName;

if(ga != 'username' || ga != 'username'){

g_form.setReadOnly('field name', true);

}

}

I had imperonated the user and user and checked but it is readonly for him too..

I dont know where i am going Wrong.   Can anyone please help.

Thanks,

[Chris Hoenig]

Since your condition is not user x OR not user y it is always going to be true and make it read only for everyone, try combining the users with && instead of || which will only be true if the user is not any of the listed users.