jQuery.fn.dataTableExt.aTypes.push( function ( sData )
{
	sData = typeof sData.replace == 'function' ?
		sData.replace( /<.*?>/g, "" ) : sData;
	
	var sValidFirstChars = "0123456789-";
	var sValidChars = "0123456789.";
	var Char;
	var bDecimal = false;
	
	/* Check for a valid first char (no period and allow negatives) */
	Char = sData.charAt(0); 
	if (sValidFirstChars.indexOf(Char) == -1) 
	{
		return null;
	}
	
	/* Check all the other characters are valid */
	for ( var i=1 ; 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 'num-html';
} );

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

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