/*

function getNextColor(counter) {

    var number_of_categories = 4;
    // The additional one is necessary for reset
    var number_of_colors = number_of_categories + 1;

    var color = counter % number_of_colors;

    color_array = new Array(number_of_colors);
    color_array[0] = "white" ;
    color_array[1] = "yellow";
    color_array[2] = "green" ;
    color_array[3] = "blue" ;
    color_array[4] = "red" ;

    return color_array[color];
}

function changeColor(item_id) {
    // alert(item_id);
    // alert(document.getElementById(item_id).style.backgroundColor);
    
    // if (dayClickArray[item_id] >= 1) {
    //    dayClickArray[item_id] += 1;
    // } else {
    //     dayClickArray[item_id] = 1;
    // }

    var number_of_categories = 4;

    if (dayClickArray[item_id] < number_of_categories) {
        dayClickArray[item_id] += 1;
    } else if (dayClickArray[item_id] == number_of_categories) {
        dayClickArray[item_id] = 0;
    } else {
        dayClickArray[item_id] = 1;
    }

    document.getElementById(item_id).style.backgroundColor=getNextColor(dayClickArray[item_id]);
    loadXMLDoc("insert-event?event_id="+dayClickArray[item_id]+"&julian_date="+item_id);
}


dayClickArray = new Array(365);

*/