var Meta = function() {
    var decline_re = /%n/g;

    var self = {
        decline: function( num, zero, one, two, many ) {
            var $nmod10 = num % 10;
            var $nmod100 = num % 100;

            if( !num ) return zero.replace( decline_re, num );

            if( ( num == 1) || ( $nmod10 == 1 && $nmod100 != 11 ) ) return one.replace( decline_re, num );

            if( $nmod10 > 1 && $nmod10 < 5 && $nmod100 != 12 && $nmod100 != 13 && $nmod100 != 14 ) return two.replace( decline_re, num );

            return many.replace( decline_re, num );
        },
        
        beautyPrice: function (price) {
            // 2123399.2034 => 2 123 399,2
            if (price === 0) {
                return 0;
            }
            price = price.toFixed(2);
            price = price.split('.');
            price[0] = price[0].replace(/(\d)(?=(\d{3})+$)/g, "$1 "); 
            if(price[1]){
                if (price[1] === "00") {
                    return price[0];
                }
                return price[0] + "," + price[1].replace(/^(\d)0$/, "$1");
            }
            return price[0];
        },

		getOsName: function() {
        	var OSName="Unknown OS";
			if (navigator.appVersion.indexOf("Win")!=-1) OSName="Windows";
			if (navigator.appVersion.indexOf("Mac")!=-1) OSName="MacOS";
			if (navigator.appVersion.indexOf("X11")!=-1) OSName="UNIX";
			if (navigator.appVersion.indexOf("Linux")!=-1) OSName="Linux";

			return OSName;
        },
        
        markEven: function (selector) {
			$(selector + ".even").removeClass("even");
			$(selector + ":even").addClass("even");	
		}
    };

	Date.metaParse = function( str ) {
		if( /(\d+)\.(\d+)\.(\d+)/.test( str ) ) {
			return Date.UTC( RegExp.$3, parseInt( RegExp.$2 ) - 1, RegExp.$1 );
		}
		return Date.parse( str );
	};

	Date.prototype.metaToString = function() {
		return this.getDate() + '.' + ( this.getMonth() + 1 ) + '.' + this.getFullYear();
	};

    return self;
}();