/* auteur: COSMOS 2000 */
/* Date de création: 17/06/2004 */

// Original by Anthony Louie  Modified By:  Ronnie T. Moore, Editor
// Source http://javascript.internet.com 
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("Entrez une année valide.");
form.year.focus();
form.year.select();
return;
   }
}       
if (year < 1582) {
form.result.value = "";
alert("L'année doit être supérieure à 1581.");
form.year.focus();
form.year.select();
return;
}
checkYear(year);
if (!checkYear(year)) form.result.value = "pas une année bissextile.";
else form.result.value = "une année bissextile.";
}
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("Entrez une année valide.");
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("Entrez une année valide.");
form.endyear.focus();
form.endyear.select();
return;
   }
}       
if (startyear < 1582) {
form.yearlist.value = "";
alert("L'année initiale doit être supérieure à 1581.");
form.startyear.focus();
form.startyear.select();
return;
}
else if (endyear <= startyear) {
form.yearlist.value = "";
alert("L'année finale doit être supérieure à l'année initiale.");
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;
   }
}