/***************************************************************************
*   Copyright (C) 2006, Paul Lutus                                        *
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
*   This program is distributed in the hope that it will be useful,       *
*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
*   GNU General Public License for more details.                          *
*                                                                         *
*   You should have received a copy of the GNU General Public License     *
*   along with this program; if not, write to the                         *
*   Free Software Foundation, Inc.,                                       *
*   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
***************************************************************************/

function addEvent(o, e, f) {
    if (o.addEventListener) {
        o.addEventListener(e, f, false);
        return true;
    }
    else if (o.attachEvent) {
        return o.attachEvent("on" + e, f);
    }
    else {
        return false;
    }
}

addEvent(window, "load", setup);
addEvent(window, "unload", makeCookie);

function getCookie(path) {
    var result = "";
    var a = document.cookie.indexOf(path);
    if (a != -1) {
        a += path.length + 1;
        var b = document.cookie.indexOf(";", a);
        if (b == -1) {
            b = document.cookie.length;
        }
        result = unescape(document.cookie.substring(a, b));
    }
    return result;
}

var cookie_array = null;
function processCookie() {
    var cookie = getCookie(window.location.pathname);
    if (cookie != '') {
        cookie_array = cookie.split(" ");
    }
}

function makeCookie() {
    var values = ((document.getElementById("ampm1").checked) ? "1" : "0");
    values += " " + ((document.getElementById("daylight1").checked) ? "1" : "0");
    var exp = new Date(new Date().getTime() + 30 * 24 * 60 * 60 * 1000);
    document.cookie = window.location.pathname + "=" + values + "; expires=" + exp.toGMTString();
}

var locations = ["Samoa", "Hawaii", "Juneau", "San Francisco"
, "Denver", "Chicago", "New York", "Caracas"
, "Rio De Janeiro", "Recife", "Azores", "London"
, "Paris", "Cairo", "Moscow", "Baku"
, "Karachi", "Dacca", "Bangkok", "Hong Kong"
, "Tokyo", "Sydney", "Noumea", "Wellington"];

function setup() {
    processCookie();
    setup_disp();
    if (cookie_array) {
        document.getElementById("ampm" + cookie_array[0]).checked = true;
        document.getElementById("daylight" + cookie_array[1]).checked = true;
    }
    update_clock();
}

function setup_disp() {
    s = "<table cellpadding=\"0\" cellspacing=\"0\" border=\"1\" bordercolor=\"#c0c0c0\" bgcolor=\"#134c40\" >";
    s += "<tr><td class=\"ccm\" colspan=\"2\">";
    s += "<input id=\"ampm0\" type=\"radio\" name=\"ampm\" checked=\"checked\">24 Hour<br />";
    s += "<input id=\"ampm1\" type=\"radio\" name=\"ampm\">AM/PM";
    s += "</td><td class=\"ccm\">";
    s += "<input id=\"daylight0\" type=\"radio\" name=\"daylight\" checked=\"checked\">Standard<br />";
    s += "<input id=\"daylight1\" type=\"radio\" name=\"daylight\">Daylight";
    s += "</td></tr>";
    s += "<tr bgcolor=\"#348b77\"><td class=\"ccb\">Zone</td>";
    s += "<td class=\"ccb\">Place</td>";
    s += "<td class=\"ccb\" >Date/Time</td></tr>";
    daylight = (cookie_array && cookie_array[1] == "1") ? 1 : 0;
    offset = (new Date().getTimezoneOffset() / 60) + daylight;
    for (i = 0; i < 24; i++) {
        q = "tz" + i;
        j = i - 11;
        si = "" + Math.abs(j)
        if (si.length < 2) si = "0" + si;
        si = ((j < 0) ? "-" : "+") + si;
        mod = (i - 11 == -offset) ? " bgcolor=\"#134c40\"" : "";
        s += "<tr" + mod + " id=\"row" + i + "\"><td class=\"cc\">UTC" + si + "</td>";
        s += "<td class=\"cc\">" + locations[i] + "</td>";
        s += "<td class=\"ccm\" id=\"v" + i + "\"></td></tr>";
    }
    s += "</table>";
    document.getElementById("clock_disp").innerHTML = s;
}

function lz(v) {
    return (v < 10) ? "0" + v : v;
}

function formatDate(d) {
    s = lz((d.getMonth() + 1))
  + "/" + lz(d.getDate())
  + "/" + d.getFullYear() + " ";
    h = d.getHours();
    if (document.getElementById("ampm1").checked) {
        ap = (h >= 12) ? "PM" : "AM";
        h = (h % 12);
        if (h == 0) h = 12;
        s += lz(h)
    + ":" + lz(d.getMinutes())
    + ":" + lz(d.getSeconds())
    + " " + ap;
    }
    else {
        s += lz(h)
    + ":" + lz(d.getMinutes())
    + ":" + lz(d.getSeconds());
    }
    return s;
}

var old_offset = -1;
var hour = 3600000; // one hour in milliseconds
function update_clock() {
    d = new Date();
    offset = d.getTimezoneOffset() / 60;
    // add daylight hour if specified
    daylight = (document.getElementById("daylight1").checked) ? 1 : 0;
    // set initial TZ to UTC-11
    offset += daylight;
    d.setTime(d.getTime() - (11 * hour) + offset * hour);
    // create time zone outputs
    for (i = -11; i <= 12; i++) {
        document.getElementById("v" + (i + 11)).innerHTML = formatDate(d);
        if (old_offset != offset) {
            color = (i == -offset) ? "#134c40" : "#134c40";
            document.getElementById("row" + (i + 11)).style.background = color;
        }
        d.setTime(d.getTime() + hour);
    }
    old_offset = offset;
    setTimeout('update_clock()', 990);
}