<script type="text/javascript">
var today=new Date(); //定義當天日期對象
var year = today.getYear(); //獲取年份
var month = today.getMonth(); //獲取月份
var date = today.getDate(); //獲取日期值
try{
//定義下個日期對象，日期值加上30天
var nextDay = new Date(year,month,date+30);
//把下個日期對象信息打印出來
document.write(nextDay.getYear(),'<br>');
document.write(nextDay.getMonth()+1,'<br>');
document.write(nextDay.getDate(),'<br>');
}catch(e){
alert(e.message);
}
</script>