function number_format( number, decimals, dec_point, thousands_sep ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +     bugfix by: Michael White (http://getsprink.com)
    // +     bugfix by: Benjamin Lupton
    // +     bugfix by: Allan Jensen (http://www.winternet.no)
    // +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
    // +     bugfix by: Howard Yeend
    // *     example 1: number_format(1234.5678, 2, '.', '');
    // *     returns 1: 1234.57     
 
    var n = number, c = isNaN(decimals = Math.abs(decimals)) ? 2 : decimals;
    var d = dec_point == undefined ? "." : dec_point;
    var t = thousands_sep == undefined ? "," : thousands_sep, s = n < 0 ? "-" : "";
    var i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", j = (j = i.length) > 3 ? j % 3 : 0;
    
    return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
}

Ext.apply(Ext.util.Format, {
	numberFormat: {
		decimalSeparator: ',',
		decimalPrecision: 2,
		groupingSeparator: '.',
		groupingSize: 3,
		currencySymbol: ''
	},
	formatNumber: function(value, numberFormat) {
		var format = Ext.apply(Ext.apply({}, this.numberFormat), numberFormat);
		if (typeof value !== 'number') {
			value = String(value);
			if (format.currencySymbol) {
				value = value.replace(format.currencySymbol, '');
			}
			if (format.groupingSeparator) {
				value = value.replace(new RegExp(format.groupingSeparator, 'g'), '');
			}
			if (format.decimalSeparator !== '.') {
				value = value.replace(format.decimalSeparator, '.');
			}
			value = parseFloat(value);
		}
		var neg = value < 0;
		value = Math.abs(value).toFixed(format.decimalPrecision);
		var i = value.indexOf('.');
		if (i >= 0) {
			if (format.decimalSeparator !== '.') {
				value = value.slice(0, i) + format.decimalSeparator + value.slice(i + 1);
			}
		} else {
			i = value.length;
		}
		if (format.groupingSeparator) {
			while (i > format.groupingSize) {
				i -= format.groupingSize;
				value = value.slice(0, i) + format.groupingSeparator + value.slice(i);
			}
		}
		if (format.currencySymbol) {
			value = format.currencySymbol + value;
		}
		if (neg) {
			value = '-' + value;
		}
		return value;
	}
});

Ext.apply(Ext.util.Format, {
	ucwords : function(value) {
		var words = value.split(/\s/);

		for (i = 0; i < words.length; i++) {
			words[i] = Ext.util.Format.capitalize(words[i]);
		}

		return words.join(' ');
        }
});