jQuery nVal()

jquery.nval.js

/* jQuery nVal() - A jQuery plugin that return numeric values from form elements
 * this plugin uses jQuery .val() so it only uses the first element in the set of matched elements
 * Examples: http://jsfiddle.net/Mottie/p2b89y5h/

 <input value="1234.567">

 $('input').val()      // returns '1234.567' (string)
 $('input').nVal()     // returns 1234.567 (numeric)
 $('input').nVal( 10 ) // returns 1234 (number; parseInt base 10 radix)

 <select multiple>
  <option value="10" selected>10</option>
  <option value="20">20</option>
  <option value="30" selected>30</option>
  <option value="40">40</option>
  <option value="50" selected>50</option>
  <option value="60">60</option>
  <option value="ten" selected>ten</option>
</select>

$('select').val()  // returns [ '10', '30', '50', 'ten' ] (string values)
$('select').nVal() // returns [ 10, 30, 50, 'ten' ] (numeric values)

*/
;(function( $ ) {

	// get element value (input/select/textarea)
	var parseVal = function( val, base ) {
		if ( isNaN( val ) ) {
			return val;
		}
		if ( isNaN( base ) ) {
			return parseFloat( val );
		} else {
			return parseInt( val, base || 10 );
		}
	};

	jQuery.fn.nVal = function( base ) {
		var val = this.val();
		if ( Object.prototype.toString.call( val ) === '[object Array]' ) {
			var indx = 0,
				arry = [],
				len = val.length;
			for ( ; indx < len; indx++ ) {
				arry[ indx ] = parseVal( val[ indx ] );
			}
			return arry;
		}
		return parseVal( val, base );
	};
	
})( jQuery );