[SkittlesAreFalling]

Quote:

Originally Posted by Omer. Code: var IsNumeric = function(input) { return (input - 0) == input && (''+input).trim().length > 0; };

I like the ReturnUser function.

You can simply:

Code:

var IsNumeric = function(test) {
    return (isNaN(parseFloat(test)) == false && isFinite(test) == true);
}

That way you can also test if a string "123" is a number or even a float "69.1994".

Quote:

print([ IsNumeric("test"), IsNumeric(true), IsNumeric("69"), IsNumeric("19.94") ]); // { 0: false, 1: false, 2: true, 3: true }