//currency
jQuery.fn.dataTableExt.oSort['currency-asc'] = function(a,b) {
	/* Remove any commas (assumes that if present all strings will have a fixed number of d.p) */
	var x = a == "-" ? 0 : a.replace( /,/g, "" );
	var y = b == "-" ? 0 : b.replace( /,/g, "" );
	
	/* Remove the currency sign */
	x = x.substring( 1 );
	y = y.substring( 1 );
	
	/* Parse and return */
	x = parseFloat( x );
	y = parseFloat( y );
	return x - y;
};

jQuery.fn.dataTableExt.oSort['currency-desc'] = function(a,b) {
	/* Remove any commas (assumes that if present all strings will have a fixed number of d.p) */
	var x = a == "-" ? 0 : a.replace( /,/g, "" );
	var y = b == "-" ? 0 : b.replace( /,/g, "" );
	
	/* Remove the currency sign */
	x = x.substring( 1 );
	y = y.substring( 1 );
	
	/* Parse and return */
	x = parseFloat( x );
	y = parseFloat( y );
	return y - x;
};

//formatted-num
jQuery.fn.dataTableExt.oSort['formatted-num-asc'] = function(x,y){
	x = x.replace(/[^\d\-\.\/]/g,'');
	y = y.replace(/[^\d\-\.\/]/g,'');
	if(x.indexOf('/')>=0)x = eval(x);
	if(y.indexOf('/')>=0)y = eval(y);
	return x/1 - y/1;
};

jQuery.fn.dataTableExt.oSort['formatted-num-desc'] = function(x,y){
	x = x.replace(/[^\d\-\.\/]/g,'');
	y = y.replace(/[^\d\-\.\/]/g,'');
	if(x.indexOf('/')>=0)x = eval(x);
	if(y.indexOf('/')>=0)y = eval(y);
	return y/1 - x/1;
};

//numeric-comma
jQuery.fn.dataTableExt.oSort['numeric-comma-asc']  = function(a,b) {
	var x = (a == "-") ? 0 : a.replace( /,/, "." );
	var y = (b == "-") ? 0 : b.replace( /,/, "." );
	x = parseFloat( x );
	y = parseFloat( y );
	return ((x < y) ? -1 : ((x > y) ?  1 : 0));
};

jQuery.fn.dataTableExt.oSort['numeric-comma-desc'] = function(a,b) {
	var x = (a == "-") ? 0 : a.replace( /,/, "." );
	var y = (b == "-") ? 0 : b.replace( /,/, "." );
	x = parseFloat( x );
	y = parseFloat( y );
	return ((x < y) ?  1 : ((x > y) ? -1 : 0));
};

//ip-address
jQuery.fn.dataTableExt.oSort['ip-address-asc']  = function(a,b) {
	var m = a.split("."), x = "";
	var n = b.split("."), y = "";
	for(var i = 0; i < m.length; i++) {
		var item = m[i];
		if(item.length == 1) {
			x += "00" + item;
		} else if(item.length == 2) {
			x += "0" + item;
		} else {
			x += item;
		}
	}
	for(var i = 0; i < n.length; i++) {
		var item = n[i];
		if(item.length == 1) {
			y += "00" + item;
		} else if(item.length == 2) {
			y += "0" + item;
		} else {
			y += item;
		}
	}
	return ((x < y) ? -1 : ((x > y) ? 1 : 0));
};

jQuery.fn.dataTableExt.oSort['ip-address-desc']  = function(a,b) {
	var m = a.split("."), x = "";
	var n = b.split("."), y = "";
	for(var i = 0; i < m.length; i++) {
		var item = m[i];
		if(item.length == 1) {
			x += "00" + item;
		} else if (item.length == 2) {
			x += "0" + item;
		} else {
			x += item;
		}
	}
	for(var i = 0; i < n.length; i++) {
		var item = n[i];
		if(item.length == 1) {
			y += "00" + item;
		} else if (item.length == 2) {
			y += "0" + item;
		} else {
			y += item;
		}
	}
	return ((x < y) ? 1 : ((x > y) ? -1 : 0));
};

//natural
jQuery.fn.dataTableExt.oSort['natural-asc']  = function(a,b) {
	return naturalSort(a,b);
};

jQuery.fn.dataTableExt.oSort['natural-desc'] = function(a,b) {
	return naturalSort(a,b) * -1;
};

//weekdays-sort
var weekdays = new Array();
weekdays['monday'] = 1;
weekdays['tuesday'] = 2;
weekdays['wednesday'] = 3;
weekdays['thursday'] = 4;
weekdays['friday'] = 5;
weekdays['saturday'] = 6;
weekdays['sunday'] = 7;

jQuery.fn.dataTableExt.oSort['weekdays-sort-asc']  = function(a,b) {
    a = a.toLowerCase();
    b = b.toLowerCase();
    return ((weekdays[a] < weekdays[b]) ? -1 : ((weekdays[a] > weekdays[b]) ?  1 : 0));
};

jQuery.fn.dataTableExt.oSort['weekdays-sort-desc'] = function(a,b) {
    a = a.toLowerCase();
    b = b.toLowerCase();
    return ((weekdays[a] < weekdays[b]) ? 1 : ((weekdays[a] > weekdays[b]) ?  -1 : 0));
};