Automatically populate current user

[gm01]

I have a catalog item request form and for the user I am using a lookup Select Box from the sys_user table so my lookup value can be a specific value that I populated in the table and the label field to be user_name.   I want it so it automatically populates the box with the person selecting it but let them possibly choose to request it on behalf of someone else who is allowed.   I have tried different reference qualifiers but haven't been able to get it to work.   Would this be possible with a reference qualifier or would I more likely have to create a script to be able to do this?

[dhasselquist]

Try this:

In the default value, enter: "javascript:gs.getUserID();"

[Deepak Ingale1]

You can auto populate user id to current logged in user by putting default value to

javascript:gs.getUserID()

[Uzuk Ataballyye]

it works for User ID, but how can i get full name of the user?

Can you help with that?