我正在尝试检查MM / DD / YYYY。
当您输入0/0/0或00/00/0000时,我的脚本会失败。我试图检查用户是否超过21岁,并且必须输入有效的两位数月份,两位数日期和4位数年份。
有什么建议吗?
$("#gate-box").submit(function() {
var day = $("#day").val();
var month = $("#month").val();
var year = $("#year").val();
var age = 21;
var mydate = new Date();
mydate.setFullYear(year, month - 1, day);
var currdate = new Date();
currdate.setFullYear(currdate.getFullYear() - age);
if ((currdate - mydate) < 0) {
$.msg("Sorry, you must be at least " + age + " to enter.");
return false;
}
else if (month > 12) {
$('#month').css({ 'border': '1px solid red' });
$.msg("Please enter a valid month.");
$('#month').focus();
return false;
}
else if (day > 31) {
$('#month').css({ 'border': 'none' });
$('#day').css({ 'border': '1px solid red' });
$.msg("Please enter a valid day.");
$('#day').focus();
return false;
}
else if (month.length === 0 || day.length === 0 || year.length === 0) {
$('#day').css({ 'border': 'none' });
$.msg("Please enter all fields.");
return false;
}
if ((currdate - mydate) > 0) {
$.colorbox.close()
$.setCookie('diageoagecheck', 'verified', { duration: 3 });
}
return false;
});
答案 0 :(得分:4)
您应该使用以下方法验证输入是否确实是数字,然后检查范围
从Validate numbers in JavaScript - IsNumeric()
复制function IsNumeric(input)
{
return (input - 0) == input && input.length > 0;
}
并像这样使用它(阅读输入后)
if (!IsNumeric(day) || day < 1)
{/*handle wrong day here and return false*/}
if (!IsNumeric(month) || (month < 1) || (month > 12))
{/*handle wrong month here and return false*/}
if (!IsNumeric(year) || (year < 1900) || (year > 2100))
{/*handle wrong year here and return false*/}
var lastDayOfMonth = new Date(year, parseInt(month) + 1, -1).getDate();
if (day > lastDayOfMonth) {
{/*handle wrong year here and return false*/}
}