Validate that end date is greater than start date with jQuery

Question

How do I check/validate in jQuery whether end date [textbox] is greater than start date [textbox]?

Answer 1

I like what Franz said, because is what I'm using :P

var date_ini = new Date($('#id_date_ini').val()).getTime();
var date_end = new Date($('#id_date_end').val()).getTime();
if (isNaN(date_ini)) {
// error date_ini;
}
if (isNaN(date_end)) {
// error date_end;
}
if (date_ini > date_end) {
// do something;
}