function showHideTab(divNo)
{
	document.getElementById("d1").style.display = 'none';
	document.getElementById("d2").style.display = 'none';
	document.getElementById("d3").style.display = 'none';
	document.getElementById("d4").style.display = 'none';
	
	document.getElementById("d" + divNo).style.display = '';
	
	document.getElementById("m1").className = '';
	document.getElementById("m2").className = '';
	document.getElementById("m3").className = '';
	document.getElementById("m4").className = '';
	
	document.getElementById("m"+divNo).className = 'selected';
}