function test1()
	{
		document.getElementById('link1').style.display='block';
		document.getElementById('link2').style.display='none';
		document.getElementById('link3').style.display='none';
		document.getElementById('test1').style.backgroundImage='url(./Design/bt1k.jpg)';
		document.getElementById('test3').style.backgroundImage='url(./Design/bt3b.jpg)';
		document.getElementById('test2').style.backgroundImage='url(./Design/bt2b.jpg)';
	}
function testa()
	{
		document.getElementById('link1').style.display='block';
		document.getElementById('link2').style.display='none';
		document.getElementById('link3').style.display='none';
		document.getElementById('test3').style.backgroundImage='url(./Design/bt3b.jpg)';
		document.getElementById('test2').style.backgroundImage='url(./Design/bt2b.jpg)';
	}
function test2()
	{
		document.getElementById('link1').style.display='none';
		document.getElementById('link2').style.display='block';
		document.getElementById('link3').style.display='none';
		document.getElementById('test2').style.backgroundImage='url(./Design/bt2k.jpg)';
		document.getElementById('test1').style.backgroundImage='url(./Design/bt1b.jpg)';
		document.getElementById('test3').style.backgroundImage='url(./Design/bt3b.jpg)';
	}
function testb()
	{
		document.getElementById('link1').style.display='none';
		document.getElementById('link2').style.display='block';
		document.getElementById('link3').style.display='none';
		document.getElementById('test1').style.backgroundImage='url(./Design/bt1b.jpg)';
		document.getElementById('test3').style.backgroundImage='url(./Design/bt3b.jpg)';
	}	
function test3()
	{
		document.getElementById('link1').style.display='none';
		document.getElementById('link2').style.display='none';
		document.getElementById('link3').style.display='block';
		document.getElementById('test3').style.backgroundImage='url(./Design/bt3k.jpg)';
		document.getElementById('test1').style.backgroundImage='url(./Design/bt1b.jpg)';
		document.getElementById('test2').style.backgroundImage='url(./Design/bt2b.jpg)';
	}
function testc()
	{
		document.getElementById('link1').style.display='none';
		document.getElementById('link2').style.display='none';
		document.getElementById('link3').style.display='block';
		document.getElementById('test1').style.backgroundImage='url(./Design/bt1b.jpg)';
		document.getElementById('test2').style.backgroundImage='url(./Design/bt2b.jpg)';
	}