How to autopopulate caller field with the current login user details using client script ?

[Sharath Goud2]

How to autopopulate caller field with the current login user details using client script ?

[Anwesha3]

You can add if condition 

isNewRecord on  display BR and check the scrachpad value on client side

[SNmatteo]

Thanks a lot Sumanth!

[sandeep goud]

function onLoad() {

var user_ID = g_user.userID;
alert(user_ID);

g_form.setValue('caller_id', user_ID);

}