// Extra functions

function UrlUnique(origurl){
var v_randomNumber = Math.random();
var v_uniqifier = v_randomNumber.toString().substr(2);
if(origurl.indexOf('?') > 0){
  origurl += '&' + v_uniqifier;
}else{
  origurl += '?' + v_uniqifier;
}
return origurl;
} 

// Filter out all rows but first n
var filterNumberItems = function(dataSet, row, rowNumber, numberItems)
{

	if (rowNumber < numberItems)
		return row; // Return the row to keep it in the data set.
	return null; // Return null to remove the row from the data set.
}

// Filter out all rows but first n
var filterMonth = function(dataSet, row, rowNumber, currentMonth)
{
	
	if (row["month"] == currentMonth) {
		return row; // Return the row to keep it in the data set.
		}
	else {
		return null; // Return null to remove the row from the data set.
	}
	
}