function derecha(e) 
{
	if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2))
	{	
		//alert('');
		//return false;	
	}
	else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2))
	{	
		//alert('');
		//return false;	
	}
}
window.document.clear 
document.onmousedown=derecha

function onLoad() 
{	
	javascript:history.go(1);	
}

function calendar(pagina,w,h,l,t) 
{	
	window.open(pagina,"Calendar","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,left=" + l + ",top=" + t + ",width=" + w + ",height=" + h +",opacity=50");		
}