function showStart()
{
	document.getElementById('col_1').style.backgroundColor 	= "#CCEDE8";
	document.getElementById('col_2').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_3').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_4').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_5').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('rij_1').style.display			= 'block';
}
function showfirstImage(directory)
{
	document.getElementById('sub_menu_eerste').src=directory;
}
function showMenu(num, color)
{
	document.getElementById('col_1').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_2').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_3').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_4').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('col_5').style.backgroundColor 	= "#FFFFFF";
	document.getElementById('rij_1').style.display			= 'none';
	document.getElementById('rij_2').style.display			= 'none';
	document.getElementById('rij_3').style.display			= 'none';
	document.getElementById('rij_4').style.display			= 'none';
	document.getElementById('rij_5').style.display			= 'none';

	document.getElementById('col_'+num).style.backgroundColor 	= color;
	document.getElementById('rij_'+num).style.backgroundColor 	= color;
	document.getElementById('rij_'+num).style.display			= 'block';
}