function Show1()
{
	window.document.getElementById('main-content').style.display = 'block';
	window.document.getElementById('img1').style.display = 'block';
    window.document.getElementById('main-content2').style.display = 'none';
	window.document.getElementById('img2').style.display = 'none';
}
	
function Show2()
{
    window.document.getElementById('main-content').style.display = 'none';
	window.document.getElementById('img1').style.display = 'none';
    window.document.getElementById('main-content2').style.display = 'block';
	window.document.getElementById('img2').style.display = 'block';
}