代码如下： <!--脚本说明：把如下代码加入<body>区域中:--> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin function run() { with (document.agecalc) { dd = parseInt(day.selectedIndex) + 1; mm = parseInt(month.selectedIndex) + 1; yy = year.value; if (yy.length != 4 || isNaN(yy)) { document.agecalc.timealive.value = "Please enter a 4-digit year."; document.agecalc.year.select(); document.agecalc.year.focus(); return; } } days = new Date(); gdate = days.getDate(); gmonth = days.getMonth(); gyear = days.getYear(); if (gyear < 2000) gyear += 1900; age = gyear - yy; if ((mm == (gmonth + 1)) && (dd <= parseInt(gdate))) { age = age; } else { if (mm <= (gmonth)) { age = age; } else { age = age - 1; } } if (age == 0) age = age; document.agecalc.timealive.value = "You are " + age+ " years old . . .\n\n"; if (mm <= (gmonth + 1)) age = age - 1; if ((mm == (gmonth + 1)) && (dd > parseInt(gdate))) age = age + 1; var m; var n; if (mm == 12) n = 31 - dd; if (mm == 11) n = 61 - dd; if (mm == 10) n = 92 - dd; if (mm == 9) n = 122 - dd; if (mm == 8) n = 153 - dd; if (mm == 7) n = 184 - dd; if (mm == 6) n = 214 - dd; if (mm == 5) n = 245 - dd; if (mm == 4) n = 275 - dd; if (mm == 3) n = 306 - dd; if (mm == 2) { n = 334 - dd; if (leapyear(yy)) n++; } if (mm == 1) { n = 365 - dd; if (leapyear(yy)) n++; } if (gmonth == 1) m = 31; if (gmonth == 2) { m = 59; if (leapyear(gyear)) m++; } if (gmonth == 3) { m = 90; if (leapyear(gyear)) m++; } if (gmonth == 4) { m = 120; if (leapyear(gyear)) m++; } if (gmonth == 5) { m = 151; if (leapyear(gyear)) m++; } if (gmonth == 6) { m = 181; if (leapyear(gyear)) m++; } if (gmonth == 7) { m = 212; if (leapyear(gyear)) m++; } if (gmonth == 8) { m = 243; if (leapyear(gyear)) m++; } if (gmonth == 9) { m = 273; if (leapyear(gyear)) m++; } if (gmonth == 10) { m = 304; if (leapyear(gyear)) m++; } if (gmonth == 11) { m = 334; if (leapyear(gyear)) m++; } if (gmonth == 12) { m = 365; if (leapyear(gyear)) m++; } months = age * 12; months += 12 - parseInt(mm); months += gmonth; totdays = (parseInt(age) * 365); totdays += age / 4; totdays = parseInt(totdays) + gdate + m + n; if (gmonth == 1) p = 31 + gdate; if (gmonth == 2) { p = 59 + gdate; if (leapyear(gyear)) m = m+1; } if (gmonth == 3) { p = 90 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 4) { p = 120 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 5) { p = 151 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 6) { p = 181 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 7) { p = 212 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 8) { p = 243 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 9) { p = 273 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 10) { p = 304 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 11) { p = 334 + gdate; if (leapyear(gyear)) p++; } if (gmonth == 12) { p = 365 + gdate; if (leapyear(gyear)) p++; } weeks = (age * 365) + n + p; weeks = weeks / 7; etcdays = parseFloat(weeks) - parseInt(weeks); etcdays = Math.round(etcdays * 7); weeks = parseInt(weeks); etcdays += parseInt(age / 4); if (etcdays > 7) weeks += parseInt(etcdays / 7); document.agecalc.timealive.value += " or " + weeks + " Weeks old\n"; document.agecalc.timealive.value += " or " + months + " Months old\n"; document.agecalc.timealive.value += " or " + totdays + " days old\n"; var time = new Date(); ghour = time.getHours(); gmin = time.getMinutes(); gsec = time.getSeconds(); hour = ((age * 365) + n + p) * 24; hour += (parseInt(age / 4) * 24); document.agecalc.timealive.value += " or " + hour + " Hours old\n"; var min = (hour * 60) + gmin; document.agecalc.timealive.value += " or " + min + " Minutes old\n"; sec = (min * 60) + gsec; document.agecalc.timealive.value += " or " + sec + " Seconds old"; mm = mm - 1; var r; if (mm == 0) r = 0; if (mm == 1) r = 31; if (mm == 2) { r = 59; if (leapyear(gyear)) m++; } if (mm == 3) { r = 90; if (leapyear(gyear)) r++; } if (mm == 4) { r = 120; if (leapyear(gyear)) r++; } if (mm == 5) { r = 151; if (leapyear(gyear)) r++; } if (mm == 6) { r = 181; if (leapyear(gyear)) r++; } if (mm == 7) { r = 212; if (leapyear(gyear)) r++; } if (mm == 8) { r = 243; if (leapyear(gyear)) r++; } if (mm == 9) { r = 273; if (leapyear(gyear)) r++; } if (mm == 10) { r = 304; if (leapyear(gyear)) r++; } if (mm == 11) { r = 334; if (leapyear(gyear)) r++; } mm = mm + 1; r = parseInt(r) + parseInt(dd); if ((mm >= (gmonth + 1)) && (dd > gdate)) { bday = r - m - gdate; } else { if ((leapyear(gyear)) && ((mm > 2) && (dd < 29))) { a = 366; } else { a = 365; } bday = a + (r - m - gdate); } nhour = 24 - parseInt(ghour); nmin = 60 - parseInt(gmin); nsec = 60 - parseInt(gsec); while (bday > 366) bday -= 365; if (((bday == 366) && (leapyear(gyear)) || ((bday == 365) && (!leapyear(gyear))))) { document.agecalc.timealive.value += "\n\nAnd, today is your birthday!"; } else { document.agecalc.timealive.value += "\n\nAnd, your next birthday is in:\n" + bday + " days " + nhour + " hrs " + nmin + " mins " + nsec + " secs"; setTimeout("run()", 1000); } } function leapyear(a) { if (((a%4 == 0) && (a%100 != 0)) || (a%400 == 0)) return true; else return false; } // End --> </script> <form name=agecalc> <table> <tr><td align=center> Birthday: <select name=month size=1> <option>January <option>February <option>March <option>April <option>May <option>June <option>July <option>August <option>September <option>October <option>November <option>December </select> <select name=day size=1> <option>1 <option>2 <option>3 <option>4 <option>5 <option>6 <option>7 <option>8 <option>9 <option>10 <option>11 <option>12 <option>13 <option>14 <option>15 <option>16 <option>17 <option>18 <option>19 <option>20 <option>21 <option>22 <option>23 <option>24 <option>25 <option>26 <option>27 <option>28 <option>29 <option>30 <option>31 </select> <input type=text name=year size=4 maxlength=4> <br> <input type=button name=start value="Calculate" onclick="run();"><br> <br> <textarea rows=12 cols=35 name=timealive>
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