function ShowOrHideEx(id, show) {
    var item = null;

    if (document.getElementById) {
      item = document.getElementById(id);
    } else if (document.all) {
      item = document.all[id];
    } else if (document.layers){
      item = document.layers[id];
    }
    if (item && item.style) {
      item.style.display = show ? "" : "none";
    }
}

function onDayChange(value) {
ShowOrHideEx("time_1", value == 2);
ShowOrHideEx("time_2", value == 3);
ShowOrHideEx("time_3", value == 4);
ShowOrHideEx("time_4", value == 5);
ShowOrHideEx("time_5", value == 6);
ShowOrHideEx("time_6", value == 7);
ShowOrHideEx("time_7", value == 8);
ShowOrHideEx("time_8", value == 9);
ShowOrHideEx("time_9", value == 10);
ShowOrHideEx("time_10", value == 11);
ShowOrHideEx("time_11", value == 12);
ShowOrHideEx("time_12", value == 13);
ShowOrHideEx("time_13", value == 14);
ShowOrHideEx("time_14", value == 16);
ShowOrHideEx("time_15", value == 17);
ShowOrHideEx("time_16", value == 18);
ShowOrHideEx("time_17", value == 19);
ShowOrHideEx("time_18", value == 20);
ShowOrHideEx("time_19", value == 21);
ShowOrHideEx("time_20", value == 22);
ShowOrHideEx("time_21", value == 23);
ShowOrHideEx("time_22", value == 24);
ShowOrHideEx("time_23", value == 25);
ShowOrHideEx("time_24", value == 26);
ShowOrHideEx("time_25", value == 27);
ShowOrHideEx("time_26", value == 28);
ShowOrHideEx("reg_btn", value==2||value==3||value==4||value==5||value==6||value==7||value==8||value==9||value==10|value==11||value==12||value==13||value==14||value==16||value==17||value==18||value==19||value==20||value==21||value==22||value==23||value==24||value==25||value==26||value==27||value==28);
}