function p (i)
{
return Math.floor(i / 10) + "" + i % 10;
}
function init ()
{
var form = document.getElementById('form');
var date = new Date();
var s = p(date.getMonth() + 1) + "/" + p(date.getDate()) + "/" + date.getFullYear() + " " + p(date.getHours()) + ":" + p(date.getMinutes()) + ":" + p(date.getSeconds());
if (form.date1.value == "")
form.date1.value = s;
if (form.date2.value == "")
form.date2.value = s;
}
function trunc (i)
{
var j = Math.round(i * 100);
return Math.floor(j / 100) + (j % 100 > 0 ? "." + p(j % 100) : "");
}
function calculate (form)
{
var date1 = new Date(form.date1.value);
var date2 = new Date(form.date2.value);
var sec = date2.getTime() - date1.getTime();
if (isNaN(sec))
{
alert("Input data is incorrect!");
return;
}
if (sec < 0)
{
alert("The second date ocurred earlier than the first one!");
return;
}
var second = 1000, minute = 60 * second, hour = 60 * minute, day = 24 * hour;
form.result_h.value = trunc(sec / hour);
form.result_m.value = trunc(sec / minute);
form.result_s.value = trunc(sec / second);
var days = Math.floor(sec / day);
sec -= days * day;
var hours = Math.floor(sec / hour);
sec -= hours * hour;
var minutes = Math.floor(sec / minute);
sec -= minutes * minute;
var seconds = Math.floor(sec / second);
form.result.value = days + " day" + (days != 1 ? "s" : "") + ", " + hours + " hour" + (hours != 1 ? "s" : "") + ", " + minutes + " minute" + (minutes != 1 ? "s" : "") + ", " + seconds + " second" + (seconds != 1 ? "s" : "");
}
]]>