//aliases
var Dom = YAHOO.util.Dom;
var $ = Dom.get;

//
function isAnyChecked()
{
	var checks;
	
	checks = document.getElementsByName('WeekDays[]'); ;
	
	for (i=0;ele=checks[i];i++)
	  if (ele.type=='checkbox')
	    if (ele.checked)
	      return true;
	
	return false;  
	
}

function requiredTime(idCalendar)
{
	hora = $(idCalendar + '_h').value;
	min =  $(idCalendar + '_mi').value;
	
	return (hora == '' || min == '') ? false:true;
	
	
}