s = "2009-2-28" alert(isDate(s))function isDate(s){ var r = /^\d{4}(\-|\/)\d{1,2}\1\d{1,2}$/ if(!r.test(s)) return false; s = s.replace(/-/g,"/"); var a = s.split("/"); var y = a[0]; var m = parseInt(a[1],10)-1; var d = parseInt(a[2],10); var dt = new Date(y,m,d); return y==dt.getFullYear() && m == dt.getMonth() && d == dt.getDate(); }
s = "2009-2-28"
alert(isDate(s))function isDate(s){
var r = /^\d{4}(\-|\/)\d{1,2}\1\d{1,2}$/
if(!r.test(s)) return false;
s = s.replace(/-/g,"/");
var a = s.split("/");
var y = a[0];
var m = parseInt(a[1],10)-1;
var d = parseInt(a[2],10);
var dt = new Date(y,m,d);
return y==dt.getFullYear() && m == dt.getMonth() && d == dt.getDate();
}