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 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 currency sign
	x = x.substring(1);
	y = y.substring(1);
	
	/* Parse and return */
	x = parseFloat( x );
	y = parseFloat( y );
	
	return y - x;
};

jQuery.fn.dataTableExt.aTypes.unshift(function(sData)
{  
	var sValidChars = "0123456789.-,";  
	var Char;  

	/* Check the numeric part */  
	for ( i=1 ; i<sData.length ; i++ )   
	{   
		Char = sData.charAt(i);   
		if (sValidChars.indexOf(Char) == -1)   
		{  
			return null;  
		}  
	}  

	/* Check prefixed by currency */  
	if(escape(sData.charAt(0)) == '%A3')
	{  
		return 'currency';  
	} 
	
	return null;  
});