function isPositiveInteger( x ) {
	return (floor(x) === x && x > 0);
}
Tests if a finite double-precision floating-point number is a positive integer.

@param {number} x - value to test
@returns {boolean} boolean indicating whether the value is a positive integer

@example
var bool = isPositiveInteger( 1.0 );
// returns true

@example
var bool = isPositiveInteger( 0.0 );
// returns false

@example
var bool = isPositiveInteger( -10.0 );
// returns false