function addCombo() {
    var textb = document.getElementById("day");
    var combo = document.getElementById("time");

      document.getElementById("time").options.length = 0;

    var v = textb.value;

    if(v == 'Monday'){
        var option1 = document.createElement("option");
        option1.text = '9:00AM';
        option1.value = '9:00AM';
        var option2 = document.createElement("option");
        option2.text = '9:30AM';
        option2.value = '9:30AM';
        var option3 = document.createElement("option");
        option3.text = '10:00AM';
        option3.value = '10:00AM';
        var option4 = document.createElement("option");
        option4.text = '10:30AM';
        option4.value = '10:30AM';
        var option5 = document.createElement("option");
        option5.text = '11:00AM';
        option5.value = '11:00AM';
        var option6 = document.createElement("option");
        option6.text = '11:30AM';
        option6.value = '11:30AM';
        var option7 = document.createElement("option");
        option7.text = '12:00PM';
        option7.value = '12:00PM';
        var option8 = document.createElement("option");
        option8.text = '1:00PM';
        option8.value = '1:00PM';
        var option9 = document.createElement("option");
        option9.text = '1:30PM';
        option9.value = '1:30PM';
        var option10 = document.createElement("option");
        option10.text = '2:00PM';
        option10.value = '2:00PM';
        var option11 = document.createElement("option");
        option11.text = '2:30PM';
        option11.value = '2:30PM';
        var option12 = document.createElement("option");
        option12.text = '3:00PM';
        option12.value = '3:00PM';
        var option13 = document.createElement("option");
        option13.text = '4:00PM';
        option13.value = '4:00PM';


        try {
            combo.add(option1, null);
            combo.add(option2, null);
            combo.add(option3, null);
            combo.add(option4, null);
            combo.add(option5, null);
            combo.add(option6, null);
            combo.add(option7, null);
            combo.add(option8, null);
            combo.add(option9, null);
            combo.add(option10, null);
            combo.add(option11, null);
            combo.add(option12, null);
            combo.add(option13, null);

        }catch(error) {
            combo.add(option1);
            combo.add(option2);
            combo.add(option3);
            combo.add(option4);
            combo.add(option5);
            combo.add(option6);
            combo.add(option7);
            combo.add(option8);
            combo.add(option9);
            combo.add(option10);
            combo.add(option11);
            combo.add(option12);
            combo.add(option13);
        }
    }


    if(v == 'Tuesday'){
        var option1 = document.createElement("option");
        option1.text = '9:00AM';
        option1.value = '9:00AM';
        var option2 = document.createElement("option");
        option2.text = '9:30AM';
        option2.value = '9:30AM';
        var option3 = document.createElement("option");
        option3.text = '10:00AM';
        option3.value = '10:00AM';
        var option4 = document.createElement("option");
        option4.text = '10:30AM';
        option4.value = '10:30AM';
        var option5 = document.createElement("option");
        option5.text = '11:00AM';
        option5.value = '11:00AM';
        var option6 = document.createElement("option");
        option6.text = '11:30AM';
        option6.value = '11:30AM';
        var option7 = document.createElement("option");
        option7.text = '12:00PM';
        option7.value = '12:00PM';
        var option8 = document.createElement("option");
        option8.text = '1:00PM';
        option8.value = '1:00PM';
        var option9 = document.createElement("option");
        option9.text = '1:30PM';
        option9.value = '1:30PM';
        var option10 = document.createElement("option");
        option10.text = '2:00PM';
        option10.value = '2:00PM';
        var option11 = document.createElement("option");
        option11.text = '2:30PM';
        option11.value = '2:30PM';
        var option12 = document.createElement("option");
        option12.text = '3:00PM';
        option12.value = '3:00PM';
        var option13 = document.createElement("option");
        option13.text = '3:30PM';
        option13.value = '3:30PM';
        var option14 = document.createElement("option");
        option14.text = '4:00PM';
        option14.value = '4:00PM';
        var option15 = document.createElement("option");
        option15.text = '4:30PM';
        option15.value = '4:30PM';
        var option16 = document.createElement("option");
        option16.text = '5:00PM';
        option16.value = '5:00PM';
        var option17 = document.createElement("option");
        option17.text = '5:30PM';
        option17.value = '5:30PM';
        var option18 = document.createElement("option");
        option18.text = '6:00PM';
        option18.value = '6:00PM';

        try {
            combo.add(option1, null);
            combo.add(option2, null);
            combo.add(option3, null);
            combo.add(option4, null);
            combo.add(option5, null);
            combo.add(option6, null);
            combo.add(option7, null);
            combo.add(option8, null);
            combo.add(option9, null);
            combo.add(option10, null);
            combo.add(option11, null);
            combo.add(option12, null);
            combo.add(option13, null);
            combo.add(option14, null);
            combo.add(option15, null);
            combo.add(option16, null);
            combo.add(option17, null);
            combo.add(option18, null);

        }catch(error) {
            combo.add(option1);
            combo.add(option2);
            combo.add(option3);
            combo.add(option4);
            combo.add(option5);
            combo.add(option6);
            combo.add(option7);
            combo.add(option8);
            combo.add(option9);
            combo.add(option10);
            combo.add(option11);
            combo.add(option12);
            combo.add(option13);
            combo.add(option14);
            combo.add(option15);
            combo.add(option16);
            combo.add(option17);
            combo.add(option18);
        }
    }


    if(v == 'Wednesday'){
        var option1 = document.createElement("option");
        option1.text = '9:00AM';
        option1.value = '9:00AM';
        var option2 = document.createElement("option");
        option2.text = '9:30AM';
        option2.value = '9:30AM';
        var option3 = document.createElement("option");
        option3.text = '10:00AM';
        option3.value = '10:00AM';
        var option4 = document.createElement("option");
        option4.text = '10:30AM';
        option4.value = '10:30AM';
        var option5 = document.createElement("option");
        option5.text = '11:00AM';
        option5.value = '11:00AM';
        var option6 = document.createElement("option");
        option6.text = '11:30AM';
        option6.value = '11:30AM';
        var option7 = document.createElement("option");
        option7.text = '12:00PM';
        option7.value = '12:00PM';
        var option8 = document.createElement("option");
        option8.text = '1:00PM';
        option8.value = '1:00PM';
        var option9 = document.createElement("option");
        option9.text = '1:30PM';
        option9.value = '1:30PM';
        var option10 = document.createElement("option");
        option10.text = '2:00PM';
        option10.value = '2:00PM';
        var option11 = document.createElement("option");
        option11.text = '2:30PM';
        option11.value = '2:30PM';
        var option12 = document.createElement("option");
        option12.text = '3:00PM';
        option12.value = '3:00PM';
        var option13 = document.createElement("option");
        option13.text = '3:30PM';
        option13.value = '3:30PM';
        var option14 = document.createElement("option");
        option14.text = '4:00PM';
        option14.value = '4:00PM';
        var option15 = document.createElement("option");
        option15.text = '4:30PM';
        option15.value = '4:30PM';
        var option16 = document.createElement("option");
        option16.text = '5:00PM';
        option16.value = '5:00PM';
        var option17 = document.createElement("option");
        option17.text = '5:30PM';
        option17.value = '5:30PM';
        var option18 = document.createElement("option");
        option18.text = '6:00PM';
        option18.value = '6:00PM';

        try {
            combo.add(option1, null);
            combo.add(option2, null);
            combo.add(option3, null);
            combo.add(option4, null);
            combo.add(option5, null);
            combo.add(option6, null);
            combo.add(option7, null);
            combo.add(option8, null);
            combo.add(option9, null);
            combo.add(option10, null);
            combo.add(option11, null);
            combo.add(option12, null);
            combo.add(option13, null);
            combo.add(option14, null);
            combo.add(option15, null);
            combo.add(option16, null);
            combo.add(option17, null);
            combo.add(option18, null);

        }catch(error) {
            combo.add(option1);
            combo.add(option2);
            combo.add(option3);
            combo.add(option4);
            combo.add(option5);
            combo.add(option6);
            combo.add(option7);
            combo.add(option8);
            combo.add(option9);
            combo.add(option10);
            combo.add(option11);
            combo.add(option12);
            combo.add(option13);
            combo.add(option14);
            combo.add(option15);
            combo.add(option16);
            combo.add(option17);
            combo.add(option18);
        }
    }


    if(v == 'Thursday'){
        var option1 = document.createElement("option");
        option1.text = '9:00AM';
        option1.value = '9:00AM';
        var option2 = document.createElement("option");
        option2.text = '9:30AM';
        option2.value = '9:30AM';
        var option3 = document.createElement("option");
        option3.text = '10:00AM';
        option3.value = '10:00AM';
        var option4 = document.createElement("option");
        option4.text = '10:30AM';
        option4.value = '10:30AM';
        var option5 = document.createElement("option");
        option5.text = '11:00AM';
        option5.value = '11:00AM';
        var option6 = document.createElement("option");
        option6.text = '11:30AM';
        option6.value = '11:30AM';
        var option7 = document.createElement("option");
        option7.text = '12:00PM';
        option7.value = '12:00PM';
        var option8 = document.createElement("option");
        option8.text = '1:00PM';
        option8.value = '1:00PM';
        var option9 = document.createElement("option");
        option9.text = '1:30PM';
        option9.value = '1:30PM';
        var option10 = document.createElement("option");
        option10.text = '2:00PM';
        option10.value = '2:00PM';
        var option11 = document.createElement("option");
        option11.text = '2:30PM';
        option11.value = '2:30PM';
        var option12 = document.createElement("option");
        option12.text = '3:00PM';
        option12.value = '3:00PM';
        var option13 = document.createElement("option");
        option13.text = '3:30PM';
        option13.value = '3:30PM';
        var option14 = document.createElement("option");
        option14.text = '4:00PM';
        option14.value = '4:00PM';
        var option15 = document.createElement("option");
        option15.text = '4:30PM';
        option15.value = '4:30PM';
        var option16 = document.createElement("option");
        option16.text = '5:00PM';
        option16.value = '5:00PM';
        var option17 = document.createElement("option");
        option17.text = '5:30PM';
        option17.value = '5:30PM';
        var option18 = document.createElement("option");
        option18.text = '6:00PM';
        option18.value = '6:00PM';
        var option19 = document.createElement("option");
        option19.text = '6:30PM';
        option19.value = '6:30PM';
        var option20 = document.createElement("option");
        option20.text = '7:00PM';
        option20.value = '7:00PM';

        try {
            combo.add(option1, null);
            combo.add(option2, null);
            combo.add(option3, null);
            combo.add(option4, null);
            combo.add(option5, null);
            combo.add(option6, null);
            combo.add(option7, null);
            combo.add(option8, null);
            combo.add(option9, null);
            combo.add(option10, null);
            combo.add(option11, null);
            combo.add(option12, null);
            combo.add(option13, null);
            combo.add(option14, null);
            combo.add(option15, null);
            combo.add(option16, null);
            combo.add(option17, null);
            combo.add(option18, null);
            combo.add(option19, null);
            combo.add(option20, null);

        }catch(error) {
            combo.add(option1);
            combo.add(option2);
            combo.add(option3);
            combo.add(option4);
            combo.add(option5);
            combo.add(option6);
            combo.add(option7);
            combo.add(option8);
            combo.add(option9);
            combo.add(option10);
            combo.add(option11);
            combo.add(option12);
            combo.add(option13);
            combo.add(option14);
            combo.add(option15);
            combo.add(option16);
            combo.add(option17);
            combo.add(option18);
            combo.add(option19);
            combo.add(option20);
        }
    }


    if(v == 'Friday'){
        var option1 = document.createElement("option");
        option1.text = '9:00AM';
        option1.value = '9:00AM';
        var option2 = document.createElement("option");
        option2.text = '9:30AM';
        option2.value = '9:30AM';
        var option3 = document.createElement("option");
        option3.text = '10:00AM';
        option3.value = '10:00AM';
        var option4 = document.createElement("option");
        option4.text = '10:30AM';
        option4.value = '10:30AM';
        var option5 = document.createElement("option");
        option5.text = '11:00AM';
        option5.value = '11:00AM';
        var option6 = document.createElement("option");
        option6.text = '11:30AM';
        option6.value = '11:30AM';
        var option7 = document.createElement("option");
        option7.text = '12:00PM';
        option7.value = '12:00PM';
        var option8 = document.createElement("option");
        option8.text = '1:00PM';
        option8.value = '1:00PM';
        var option9 = document.createElement("option");
        option9.text = '1:30PM';
        option9.value = '1:30PM';
        var option10 = document.createElement("option");
        option10.text = '2:00PM';
        option10.value = '2:00PM';
        var option11 = document.createElement("option");
        option11.text = '2:30PM';
        option11.value = '2:30PM';
        var option12 = document.createElement("option");
        option12.text = '3:00PM';
        option12.value = '3:00PM';
        var option13 = document.createElement("option");
        option13.text = '3:30PM';
        option13.value = '3:30PM';
        var option14 = document.createElement("option");
        option14.text = '4:00PM';
        option14.value = '4:00PM';
        var option15 = document.createElement("option");
        option15.text = '4:30PM';
        option15.value = '4:30PM';
        var option16 = document.createElement("option");
        option16.text = '5:00PM';
        option16.value = '5:00PM';
        var option17 = document.createElement("option");
        option17.text = '5:30PM';
        option17.value = '5:30PM';
        var option18 = document.createElement("option");
        option18.text = '6:00PM';
        option18.value = '6:00PM';
        var option19 = document.createElement("option");
        option19.text = '6:30PM';
        option19.value = '6:30PM';
        var option20 = document.createElement("option");
        option20.text = '7:00PM';
        option20.value = '7:00PM';

        try {
            combo.add(option1, null);
            combo.add(option2, null);
            combo.add(option3, null);
            combo.add(option4, null);
            combo.add(option5, null);
            combo.add(option6, null);
            combo.add(option7, null);
            combo.add(option8, null);
            combo.add(option9, null);
            combo.add(option10, null);
            combo.add(option11, null);
            combo.add(option12, null);
            combo.add(option13, null);
            combo.add(option14, null);
            combo.add(option15, null);
            combo.add(option16, null);
            combo.add(option17, null);
            combo.add(option18, null);
            combo.add(option19, null);
            combo.add(option20, null);

        }catch(error) {
            combo.add(option1);
            combo.add(option2);
            combo.add(option3);
            combo.add(option4);
            combo.add(option5);
            combo.add(option6);
            combo.add(option7);
            combo.add(option8);
            combo.add(option9);
            combo.add(option10);
            combo.add(option11);
            combo.add(option12);
            combo.add(option13);
            combo.add(option14);
            combo.add(option15);
            combo.add(option16);
            combo.add(option17);
            combo.add(option18);
            combo.add(option19);
            combo.add(option20);
        }
    }



    if(v == 'Saturday'){
        var option0 = document.createElement("option");
        option0.text = '8:30AM';
        option0.value = '8:30AM';
        var option1 = document.createElement("option");
        option1.text = '9:00AM';
        option1.value = '9:00AM';
        var option2 = document.createElement("option");
        option2.text = '9:30AM';
        option2.value = '9:30AM';
        var option3 = document.createElement("option");
        option3.text = '10:00AM';
        option3.value = '10:00AM';
        var option4 = document.createElement("option");
        option4.text = '10:30AM';
        option4.value = '10:30AM';
        var option5 = document.createElement("option");
        option5.text = '11:00AM';
        option5.value = '11:00AM';
        var option6 = document.createElement("option");
        option6.text = '11:30AM';
        option6.value = '11:30AM';
        var option7 = document.createElement("option");
        option7.text = '12:00PM';
        option7.value = '12:00PM';
        var option8 = document.createElement("option");
        option8.text = '1:00PM';
        option8.value = '1:00PM';

        try {
            combo.add(option0, null);
            combo.add(option1, null);
            combo.add(option2, null);
            combo.add(option3, null);
            combo.add(option4, null);
            combo.add(option5, null);
            combo.add(option6, null);
            combo.add(option7, null);
            combo.add(option8, null);

        }catch(error) {
            combo.add(option0);
            combo.add(option1);
            combo.add(option2);
            combo.add(option3);
            combo.add(option4);
            combo.add(option5);
            combo.add(option6);
            combo.add(option7);
            combo.add(option8);
        }
    }

    //document.getElementById("day2").disabled = true;
    //document.getElementById("display").disabled = true;
    //textb.value = "";
}