📄 cuentaatrasunafecha.java
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<html>
<head>
<script>
//Codigo que muestra la cuenta atras hasta el final del a駉 2010
//La Web del Programador
//http://www.lawebdelprogramador.com
//variables que determinan la fecha y hora final de la cuenta atras
toYear=2010;
toMonth=12;
toDay=31;
toHour=23;
toMinute=59;
toSecond=59;
function countDown()
{
new_year=0;
new_month=0;
new_day=0;
new_hour=0;
new_minute=0;
new_second=0;
actual_date=new Date();
if(actual_date.getFullYear()>toYear)
{
//si ya nos hemos pasado del a駉, mostramos los valores a 0
form.second.value=0;
form.minute.value=0;
form.hour.value=0;
form.day.value=0;
form.month.value=0;
form.year.value=0;
}else{
new_second=new_second+toSecond-actual_date.getSeconds();
if(new_second<0)
{
new_second=60+new_second;
new_minute=-1;
}
form.second.value=new_second;
new_minute=new_minute+toMinute-actual_date.getMinutes();
if(new_minute<0)
{
new_minute=60+new_minute;
new_hour=-1;
}
form.minute.value=new_minute;
new_hour=new_hour+toHour-actual_date.getHours();
if(new_hour<0)
{
new_hour=24+new_hour;
new_day=-1;
}
form.hour.value=new_hour;
new_day=new_day+toDay-actual_date.getDate();
if(new_day<0)
{
x=actual_date.getMonth();
if(x==0||x==2||x==4||x==6||x==7||x==9||x==11){new_day=31+new_day;}
if(x==3||x==5||x==8||x==10){new_day=30+new_day;}
if(x==1)
{
//comprobamos si es un a駉 bisiesto...
if(actual_date.getYear()/4-Math.floor(actual_date.getYear()/4)==0)
{
actual_date=29+actual_date;
}else{
actual_date=28+actual_date;
}
}
}
form.day.value=new_day;
new_month=-1;
new_month=new_month+toMonth-actual_date.getMonth();
if(new_month<0)
{
new_month=11+new_month;
new_year=-1;
}
form.month.value=new_month;
new_year=new_year+toYear-actual_date.getFullYear();
if(new_year<0)
{
form.year.value=0;
}else{
form.year.value=new_year;
//vuelve a ejecutar la funcion dentro de 1000 milisegundos = 1 segundo
setTimeout("countDown()",1000);
}
}
}
</script>
<style type="text/css">
.form_input
{
font-family: Verdana;
font-size: 12;
color: #ffffff;
border-width: 0;
background-color: #000077;
text-align: right;
}
</style>
</head>
<!--Al iniciar la pagina, ejecutamos la funcion-->
<body onload="countDown();">
<!--formulario deshabilitado donde se muestran los datos-->
<form name="form">
Tiempo que falta hasta el fin del a駉 2010.<br><br>
<input type="text" size="5" class="form_input" name="year" disabled> a駉s<br>
<input type="text" size="5" class="form_input" name="month" disabled> meses<br>
<input type="text" size="5" class="form_input" name="day" disabled> dias<br>
<input type="text" size="5" class="form_input" name="hour" disabled> horas<br>
<input type="text" size="5" class="form_input" name="minute" disabled> minutos<br>
<input type="text" size="5" class="form_input" name="second" disabled> segundos<br>
</form>
</body>
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