hello. i have a qustion that maybe has a very simple answer but i'm a beginner in working with scripts and i couldn't find it.

i have this code:
Code JavaScript:
function update_livraredetalii() {
	var dd = $('#livare-data').val();
	dd = Date.fromString(dd);
 
	var oraazi = new Date().getHours();//0--23
	var ziazi = new Date().getDay();//0--6, 0 dum
 
	if (dd.getDayOfYear() == today.getDayOfYear() && oraazi >=12) {
		$('#li1').hide();$('#li4').hide();$('#li5').hide();
		$('#li2').show();
		$('#li3').show();
		$('#livare-interval').val($('#li2').html());
 
	} else {
		$('#li1').show();
		$('#li2').show();
		$('#li3').show();
        $('#li4').show();
        $('#li5').hide();
	}	
 
	dd = dd.asStringFmt('yyyy-mm-dd');
	$('#livraredetalii').val(dd+" "+$('#livare-interval').val());
}
$(function(){
	today = new Date();today.setHours(0);today.setMinutes(0);today.setSeconds(0);today.setMilliseconds(0);
	var oraazi = new Date().getHours();//0--23
	var ziazi = new Date().getDay();//0--6, 0 dum
 
	var msecsInADay = 86400000;
	firstday = today;
	if (ziazi == 0 || (ziazi != 6 && oraazi >= 16) ) { if it's sunday after 4PM
		firstday = new Date(today.getTime()+msecsInADay);
	} else
	if (ziazi == 6 && oraazi >= 10) {//if it's saturday after 10AM
		firstday = new Date(today.getTime()+2*msecsInADay); //next day is monday
	} else 
	if (zonaclasa != 0) {
		firstday = new Date(today.getTime()+msecsInADay);$('#li4').hide();
	} else
	if (oraazi >= 9) { //if it's after 9 PM hide the intervals 1 and 4
		$('#li1').hide();$('#li4').hide();
		$('#li2').show();$('#li3').show();
	}
 
	<#if mag.hasText("setup.inchideazi")>
	firstday = new Date(today.getTime()+msecsInADay);
	</#if>
	<#if mag.hasText("setup.inchidemaine")>
	firstday = new Date(today.getTime()+2*msecsInADay);
	</#if>
	Date.format = 'dd-mmm-yyyy';
	$('.date-picker').datePicker({
		clickInput:true,
		showYearNavigation:false,
		createButton:false,
		renderCallback:function($td,thisDate,month,year) {
			if (thisDate.getDay() == 0 || thisDate.getDayOfYear() < firstday.getDayOfYear()) { //ascundem default toate zilele pana la firstday si duminicile
				$td.addClass('disabled');
            }
 		}
	}).val(firstday.asString())
	.trigger('change');

so i have 5 time intervals but the thing that i couldn't do is to make that for saturdays to show only the 5th interval and hide the other ones.

i've tried adding something like this
Code JavaScript:
if (ziazi == 6) {
		$('#li1').hide();
		$('#li2').hide();
		$('#li3').hide();
        $('#li4').hide();
        $('#li5').show();
}

but it didn't work

does anyone have any idea.

Thank you