var ticket = "11122";
var reg = new RegExp('^[0-9]*$');
if (reg.test(ticket)==false) {
alert('Only Numeric Ticket ID is allowed.');
return false;
}var numberPattern = /\d+/g;
'something102asdfkj1948948'.match( numberPattern )let test = "1(919)-723-9378"
console.log(test.replace(/[^\d]/g, "")) // output: 19197239378
/\D/g //\D is everything not \d
/[^\d]/g //\d is numerical characters 0-9
/[^0-9]/g //The ^ inside [] means not, so in this case, not numerical characters/^[0-9]*$/.test('abc123') // false