TomaHawkk
En los Faqs, tienes varios ejemplos
http://www.forosdelweb.com/showthrea...856#post326199 Código PHP:
<html>
<head>
<script language="JavaScript">
function esDigito(sChr){
var sCod = sChr.charCodeAt(0);
return ((sCod > 47) && (sCod < 58));
}
function valSep(oTxt){
var bOk = false;
bOk = bOk || ((oTxt.value.charAt(2) == "-") && (oTxt.value.charAt(5) == "-"));
bOk = bOk || ((oTxt.value.charAt(2) == "/") && (oTxt.value.charAt(5) == "/"));
return bOk;
}
function finMes(oTxt){
var nMes = parseInt(oTxt.value.substr(3, 2), 10);
var nAno = parseInt(oTxt.value.substr(6), 10);
var nRes = 0;
switch (nMes){
case 1: nRes = 31; break;
case 2: nRes = 28; break;
case 3: nRes = 31; break;
case 4: nRes = 30; break;
case 5: nRes = 31; break;
case 6: nRes = 30; break;
case 7: nRes = 31; break;
case 8: nRes = 31; break;
case 9: nRes = 30; break;
case 10: nRes = 31; break;
case 11: nRes = 30; break;
case 12: nRes = 31; break;
}
return nRes + (((nMes == 2) && (nAno % 4) == 0)? 1: 0);
}
function valDia(oTxt){
var bOk = false;
var nDia = parseInt(oTxt.value.substr(0, 2), 10);
bOk = bOk || ((nDia >= 1) && (nDia <= finMes(oTxt)));
return bOk;
}
function valMes(oTxt){
var bOk = false;
var nMes = parseInt(oTxt.value.substr(3, 2), 10);
bOk = bOk || ((nMes >= 1) && (nMes <= 12));
return bOk;
}
function valAno(oTxt){
var bOk = true;
var nAno = oTxt.value.substr(6);
bOk = bOk && ((nAno.length == 2) || (nAno.length == 4));
if (bOk){
for (var i = 0; i < nAno.length; i++){
bOk = bOk && esDigito(nAno.charAt(i));
}
}
return bOk;
}
function valFecha(oTxt){
var bOk = true;
if (oTxt.value != ""){
bOk = bOk && (valAno(oTxt));
bOk = bOk && (valMes(oTxt));
bOk = bOk && (valDia(oTxt));
bOk = bOk && (valSep(oTxt));
return bOk;
}
}
function fechaMayorOIgualQue(fec0, fec1){
var bRes = false;
var sDia0 = fec0.value.substr(0, 2);
var sMes0 = fec0.value.substr(3, 2);
var sAno0 = fec0.value.substr(6, 4);
var sDia1 = fec1.value.substr(0, 2);
var sMes1 = fec1.value.substr(3, 2);
var sAno1 = fec1.value.substr(6, 4);
if (sAno0 > sAno1) bRes = true;
else {
if (sAno0 == sAno1){
if (sMes0 > sMes1) bRes = true;
else {
if (sMes0 == sMes1)
if (sDia0 >= sDia1) bRes = true;
}
}
}
return bRes;
}
function valFechas(){
var bOk = false;
if (valFecha(document.f1.fec0)){
if (valFecha(document.f1.fec1)){
if (fechaMayorOIgualQue(document.f1.fec1, document.f1.fec0)){
bOk = true;
alert("Ok");
} else {
alert("Rango inválido");
document.f1.fec1.focus();
}
} else {
alert("Fecha inválida");
document.f1.fec1.focus();
}
} else {
alert("Fecha inválida");
document.f1.fec0.focus();
}
}
</script>
</head>
<body>
<form name="f1">
<table>
<tr>
<td align="right">
Fecha inicial (dd/mm/aaaa):
</td>
<td>
<input type="text" size="10" name="fec0">
</td>
</tr>
<tr>
<td align="right">
Fecha final (dd/mm/aaaa):
</td>
<td>
<input type="text" size="10" name="fec1">
</td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="button" name="val" value="Validar" onclick="valFechas()">
</td>
</tr>
</table>
</form>
</body>
</html>
Saludos