//var x;

function head1()
{
	if (document.getElementById("a1").className='blue')
	{
		document.getElementById('a1').className = 'blue';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'black';
		//document.getElementById('g8').className = 'black';
	}
		
}

function head2()
{
	if (document.getElementById("b2").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'blue';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'black';
		//document.getElementById('g8').className = 'black';

	}
	
}

function head3()
{
	if (document.getElementById("c3").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'blue';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'black';
//		document.getElementById('g8').className = 'black';

		
		}
	
}

function head4()
{
	if (document.getElementById("d4").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'blue';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'black';
//		document.getElementById('g8').className = 'black';

		}
	
}

function head5()
{
	if (document.getElementById("e5").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'blue';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'black';
//		document.getElementById('g8').className = 'black';

		}
	
}

function head6()
{
	if (document.getElementById("f6").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'blue';
		document.getElementById('g7').className = 'black';
//		document.getElementById('g8').className = 'black';

		}
	
}

function head7()
{
	if (document.getElementById("g7").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'blue';
//		document.getElementById('g8').className = 'black';

		}
	
}

/*function head8()
{
	if (document.getElementById("g8").className='black')
	{
		document.getElementById('a1').className = 'black';
		document.getElementById('b2').className = 'black';
		document.getElementById('c3').className = 'black';
		document.getElementById('d4').className = 'black';
		document.getElementById('e5').className = 'black';
		document.getElementById('f6').className = 'black';
		document.getElementById('g7').className = 'black';
		document.getElementById('g8').className = 'blue';

		}
	
}
*/