javascript
conversioni e utilità
italiano
english
Tabelle di conversione
scegli una GRANDEZZA
ACCELERAZIONE
ANGOLI
AREA
CALORE, entropia, etc.
ELETTRICITA' e MAGNET.
ENERGIA e LAVORO
FORZA
LUNGHEZZA
LUCE
MASSA e INERZIA
MOMENTO della FORZA
PERMEABILITA'
POTENZA
PRESSIONE
RADIOLOGIA
TEMPERATURA
TEMPO
VELOCITA'
VISCOSITA',dina., cine.
VOLUME, capac. portata
Fattori di conversione in PDF
SELEZIONA
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
V
W
Y
ALL LIST
sistema internazionale
multipli e sottomultipli
costanti fondamentali
unità fondamentali e derivate
tavola periodica
calcolatrice anni bisestili
BROWSER compatibili
: Explorer - Netscape
<head> <script LANGUAGE="JavaScript"> <!-- Original: Anthony Louie --> <!-- This script and many more are available free online at --> <!-- The JavaScript Math - http://www.themeter.net --> <!-- Begin function checkYear(year) { return (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) ? 1 : 0; } function leap(form) { year = form.year.value; var Check1 = parseFloat(year); for (var i = 0; i < year.length; i++) { var sLetterCheck1 = year.substring(i, i+1); if (sLetterCheck1 < "0" || sLetterCheck1 > "9") { alert("Enter a valid year."); form.year.focus(); form.year.select(); return; } } if (year < 1582) { form.result.value = ""; alert("Year must be greater than 1581."); form.year.focus(); form.year.select(); return; } checkYear(year); if (!checkYear(year)) form.result.value = "not a leap year."; else form.result.value = "a leap year."; } function MakeArray(n) { if (n <= 0) { this.length = 0; return this; } this.length = n; for (var i = 1; i <= n; i++) { this[i] = 0; } return this; } var listArray = new MakeArray(160); var index = 0; function list(form) { startyear = form.startyear.value; endyear = form.endyear.value; var Check1 = parseFloat(startyear); var Check2 = parseFloat(endyear); for (var i = 0; i < startyear.length; i++) { var sLetterCheck1 = startyear.substring(i, i+1); if (sLetterCheck1 < "0" || sLetterCheck1 > "9") { alert("Enter a valid start year."); form.startyear.focus(); form.startyear.select(); return; } } for (var i = 0; i < endyear.length; i++) { var sLetterCheck2 = endyear.substring(i, i+1); if (sLetterCheck2 < "0" || sLetterCheck2 > "9") { alert("Enter a valid end year."); form.endyear.focus(); form.endyear.select(); return; } } if (startyear < 1582) { form.yearlist.value = ""; alert("Start year must be greater than 1581."); form.startyear.focus(); form.startyear.select(); return; } else if (endyear <= startyear) { form.yearlist.value = ""; alert("End year must be greater than start year."); form.endyear.focus(); form.endyear.select(); return; } else { index = 0; for (var i=startyear; i <=endyear; i++) { if (checkYear(i)) { listArray[index] = i; index++; } } } var allYears; allYears = ""; for( i = 0; i < index; i++ ) { allYears += listArray[i] + "\r" + "\n"; form.yearlist.value = allYears; } } // End --> </script> </head> <body> <form> <div align="center"><center><p>Check For Leap Year:<br> Year: <input type="text" name="year" size="4"> is <input type="text" name="result" size="15"><br> <input type="button" value="Check Year" onClick="leap(this.form);"></p> </center></div><hr width="25%"> <div align="center"><center><p>Leap Years Within A Range:<br> Start Year:<input type="text" name="startyear" size="4"><br> End year: <input type="text" name="endyear" size="4"><br> <br> <input type="button" name="listyears" value="List Years" onClick="list(this.form);"><br> <textarea name="yearlist" rows="10" cols="11"></textarea></p> </center></div> </form> </body>
seleziona tutto il codice ed utilizza
copia-incolla
per inserirlo nelle tue pagine
Copyright © 1999 -2010 THEmeter.net -Tutti i diritti riservati -
|
Home
|
Search
|
Disclaimer
|
E-mail
|
Donazioni
|
- www.THEmeter.net -- www.conversioni.it
-
(ver. # 23.03.08 )
