JQuery validator number extention. Allows both the decimal dot and decimal comma.

number_decimal_dot_and_comma.js

$.extend( $.validator.methods, {
    	number: function( value, element ) {
    	    var result = false;
    	    if(/^(?:-?\d+|-?\d{1,3}(?:,\d{3})+)?(?:,\d+)?$/.test( value )){
    	        result = true;
            } else if(/^(?:-?\d+|-?\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/.test( value )){
                result = true;
            }
    		return this.optional( element ) || result;
    	}
    } );