tnumber = 6; // number of testimonials
function toggleT ()	{
	currentT += 1;
	if (currentT > tnumber)	{
		currentT = 1;
	}
	displayT();
}

function displayT ()	{
	// hide unwanted divs
	for (var i = 1; i <= tnumber; i++)	{
		document.getElementById('t'+i).style.display = 'none';
	}
	
	//display correct div
	document.getElementById('t'+currentT).style.display = 'block';
}