/*
**  jquery.replaceClass.js -- jQuery "plugin", helps classname manip.
**  Copyright (c) 2007 Francois Lafortune (quickredfox.at)
**  Licensed under MIT 
**
*/
jQuery.fn.replaceClass = function(toReplace,replaceWith) {
	return $(this).each(function() {
		return $(this).removeClass(toReplace).addClass(replaceWith);
	});
}

jQuery.fn.numericOnly = function() {
	return this.each(function() {
		$(this).keydown(function(e) {
			var key = e.charCode || e.keyCode || 0;
			
			// allow backspace, tab, delete, arrows, numbers and keypad numbers ONLY
			return (
				key == 8 || 
				key == 9 ||
				key == 46 ||
				(key >= 37 && key <= 40) ||
				(key >= 48 && key <= 57) ||
				(key >= 96 && key <= 105));
			});
	})
}


jQuery.extend({
	commaFormat: function (nStr) {
		nStr += '';
		x = nStr.split('.');
		x1 = x[0];
		x2 = x.length > 1 ? '.' + x[1] : '';
		var rgx = /(\d+)(\d{3})/;
		while (rgx.test(x1)) {
			x1 = x1.replace(rgx, '$1' + ',' + '$2');
		}
		return x1 + x2;
	},
	
	sprintf: function() {
		// http://kevin.vanzonneveld.net
		// +   original by: Ash Searle (http://hexmen.com/blog/)
		// + namespaced by: Michael White (http://getsprink.com)
		// +    tweaked by: Jack
		// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
		// +      input by: Paulo Freitas
		// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
		// +      input by: Brett Zamir (http://brett-zamir.me)
		// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
		// *     example 1: sprintf("%01.2f", 123.1);
		// *     returns 1: 123.10
		// *     example 2: sprintf("[%10s]", 'monkey');
		// *     returns 2: '[    monkey]'
		// *     example 3: sprintf("[%'#10s]", 'monkey');
		// *     returns 3: '[####monkey]'
		var regex = /%%|%(\d+\$)?([-+\'#0 ]*)(\*\d+\$|\*|\d+)?(\.(\*\d+\$|\*|\d+))?([scboxXuidfegEG])/g;
		var a = arguments,
			i = 0,
			format = a[i++];

		// pad()
		var pad = function (str, len, chr, leftJustify) {
			if (!chr) {
				chr = ' ';
			}
			var padding = (str.length >= len) ? '' : Array(1 + len - str.length >>> 0).join(chr);
			return leftJustify ? str + padding : padding + str;
		};

		// justify()
		var justify = function (value, prefix, leftJustify, minWidth, zeroPad, customPadChar) {
			var diff = minWidth - value.length;
			if (diff > 0) {
				if (leftJustify || !zeroPad) {
					value = pad(value, minWidth, customPadChar, leftJustify);
				} else {
					value = value.slice(0, prefix.length) + pad('', diff, '0', true) + value.slice(prefix.length);
				}
			}
			return value;
		};

		// formatBaseX()
		var formatBaseX = function (value, base, prefix, leftJustify, minWidth, precision, zeroPad) {
			// Note: casts negative numbers to positive ones
			var number = value >>> 0;
			prefix = prefix && number && {
				'2': '0b',
				'8': '0',
				'16': '0x'
			}[base] || '';
			value = prefix + pad(number.toString(base), precision || 0, '0', false);
			return justify(value, prefix, leftJustify, minWidth, zeroPad);
		};

		// formatString()
		var formatString = function (value, leftJustify, minWidth, precision, zeroPad, customPadChar) {
			if (precision != null) {
				value = value.slice(0, precision);
			}
			return justify(value, '', leftJustify, minWidth, zeroPad, customPadChar);
		};

		// doFormat()
		var doFormat = function (substring, valueIndex, flags, minWidth, _, precision, type) {
			var number;
			var prefix;
			var method;
			var textTransform;
			var value;

			if (substring == '%%') {
				return '%';
			}

			// parse flags
			var leftJustify = false,
				positivePrefix = '',
				zeroPad = false,
				prefixBaseX = false,
				customPadChar = ' ';
			var flagsl = flags.length;
			for (var j = 0; flags && j < flagsl; j++) {
				switch (flags.charAt(j)) {
				case ' ':
					positivePrefix = ' ';
					break;
				case '+':
					positivePrefix = '+';
					break;
				case '-':
					leftJustify = true;
					break;
				case "'":
					customPadChar = flags.charAt(j + 1);
					break;
				case '0':
					zeroPad = true;
					break;
				case '#':
					prefixBaseX = true;
					break;
				}
			}

			// parameters may be null, undefined, empty-string or real valued
			// we want to ignore null, undefined and empty-string values
			if (!minWidth) {
				minWidth = 0;
			} else if (minWidth == '*') {
				minWidth = +a[i++];
			} else if (minWidth.charAt(0) == '*') {
				minWidth = +a[minWidth.slice(1, -1)];
			} else {
				minWidth = +minWidth;
			}

			// Note: undocumented perl feature:
			if (minWidth < 0) {
				minWidth = -minWidth;
				leftJustify = true;
			}

			if (!isFinite(minWidth)) {
				throw new Error('sprintf: (minimum-)width must be finite');
			}

			if (!precision) {
				precision = 'fFeE'.indexOf(type) > -1 ? 6 : (type == 'd') ? 0 : undefined;
			} else if (precision == '*') {
				precision = +a[i++];
			} else if (precision.charAt(0) == '*') {
				precision = +a[precision.slice(1, -1)];
			} else {
				precision = +precision;
			}

			// grab value using valueIndex if required?
			value = valueIndex ? a[valueIndex.slice(0, -1)] : a[i++];

			switch (type) {
			case 's':
				return formatString(String(value), leftJustify, minWidth, precision, zeroPad, customPadChar);
			case 'c':
				return formatString(String.fromCharCode(+value), leftJustify, minWidth, precision, zeroPad);
			case 'b':
				return formatBaseX(value, 2, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
			case 'o':
				return formatBaseX(value, 8, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
			case 'x':
				return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
			case 'X':
				return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad).toUpperCase();
			case 'u':
				return formatBaseX(value, 10, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
			case 'i':
			case 'd':
				number = (+value) | 0;
				prefix = number < 0 ? '-' : positivePrefix;
				value = prefix + pad(String(Math.abs(number)), precision, '0', false);
				return justify(value, prefix, leftJustify, minWidth, zeroPad);
			case 'e':
			case 'E':
			case 'f':
			case 'F':
			case 'g':
			case 'G':
				number = +value;
				prefix = number < 0 ? '-' : positivePrefix;
				method = ['toExponential', 'toFixed', 'toPrecision']['efg'.indexOf(type.toLowerCase())];
				textTransform = ['toString', 'toUpperCase']['eEfFgG'.indexOf(type) % 2];
				value = prefix + Math.abs(number)[method](precision);
				return justify(value, prefix, leftJustify, minWidth, zeroPad)[textTransform]();
			default:
				return substring;
			}
		};

		return format.replace(regex, doFormat);
	},
	
	timespan: function(startDate, endDate) {
		var diff = endDate.getTime() - startDate.getTime();
		var years = Math.floor(diff / 31536000000);
		var months = Math.floor((diff % 31536000000) / 2628000000);
		var days = Math.floor(((diff % 31536000000) % 2628000000) / 86400000);
		
		var ret = '';
		
		if (years >= 1) 
		{
			ret += years + ' ';
			ret += (years > 1) ? 'years' : 'year';
		}
		
		if (months >= 1)
		{
			if (ret != '') ret += ', ';
			
			ret += months + ' ';
			ret += (months > 1) ? 'months' : 'month';
		}
		
		if (days >= 1)
		{
			if (ret != '') ret += ', ';
			
			ret += days + ' ';
			ret += (days > 1) ? 'days' : 'day';
		}
		
		return ret;
	}
});