jQuery.fn.dataTableExt.aTypes.unshift(
	function ( sData )
	{
		var sValidChars = "0123456789-, to In Stock Weeks";
		var Char;
		var bDecimal = false;
		
		/* Check the numeric part */
		for ( i=0 ; i<sData.length ; i++ )
		{
			Char = sData.charAt(i);
			if (sValidChars.indexOf(Char) == -1)
			{
				return null;
			}
			
			/* Only allowed one decimal place... */
			if ( Char == "," )
			{
				if ( bDecimal )
				{
					return null;
				}
				bDecimal = true;
			}
		}
		
		return 'numeric-comma';
	}
);

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

	var x = (a == "-") ? 0 : a.replace( " to ", "." );
	var y = (b == "-") ? 0 : b.replace( " to ", "." );

	var x = (a == "-") ? 0 : a.replace( "In Stock", "0" );
	var y = (b == "-") ? 0 : b.replace( "In Stock", "0" );
	
	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( /,/, "." );

	var x = (a == "-") ? 0 : a.replace( " to ", "." );
	var y = (b == "-") ? 0 : b.replace( " to ", "." );

	var x = (a == "-") ? 0 : a.replace( "In Stock", "0" );
	var y = (b == "-") ? 0 : b.replace( "In Stock", "0" );
		
	x = parseFloat( x );
	y = parseFloat( y );
	return ((x < y) ?  1 : ((x > y) ? -1 : 0));
};