I am trying to use ".show() - .hide()" on a specific field when I selecting a specific day of the week.

I have tried a lot of codes lying on the net and without any success.

Day 6 is working and disabling but whats inside "IF" is not working

2. jQuery( "#pickup_date" ).datepicker({
3.     beforeShowDay: function(d) {
4.           var day = d.getDay();
5.           if( day != 5 ) {
6.                   jQuery("p#pickup_time_field").hide();
7.                   jQuery("p#pickup_time_friday_field").show();
8.             }else if( day != 4||day != 3||day != 2||day != 1||day != 0 ){
9.                   jQuery("p#pickup_time_field").show();
10.                   jQuery("p#pickup_time_friday_field").hide();
11.             }
12.       return [(day != 6 )];
13.     }
14. });
15. jQuery( "#date_num" ).datepicker({
16.     beforeShowDay: function(d) {
17.           var day = d.getDay();
18.           if( day != 5 ) {
19.                   jQuery("p#time_num_friday_field").hide();
20.                   jQuery("p#time_num_field").show();
21.             }else if( day != 4||day != 3||day != 2||day != 1||day != 0 ){
22.                   jQuery("p#time_num_friday_field").show();
23.                   jQuery("p#time_num_field").hide();
24.             }
25.       return [(day != 6 )];
26.     }
27. });