// Updates end date on calendar submission/edit when user changes start date
function cDates(){
	var sdate = document.getElementById('s_eyear')[document.getElementById('s_eyear').selectedIndex].value + 
		document.getElementById('s_emonth')[document.getElementById('s_emonth').selectedIndex].value + 
		document.getElementById('s_eday')[document.getElementById('s_eday').selectedIndex].value;

	var edate = document.getElementById('e_eyear')[document.getElementById('e_eyear').selectedIndex].value + 
		document.getElementById('e_emonth')[document.getElementById('e_emonth').selectedIndex].value + 
		document.getElementById('e_eday')[document.getElementById('e_eday').selectedIndex].value;

	sdate = sdate * 1;
	edate = edate * 1;

	if(sdate > edate){
		document.getElementById('e_eyear').selectedIndex = document.getElementById('s_eyear').selectedIndex;
		document.getElementById('e_emonth').selectedIndex = document.getElementById('s_emonth').selectedIndex;
		document.getElementById('e_eday').selectedIndex = document.getElementById('s_eday').selectedIndex;
	}
}

// Check & validate calendar event submission/edit
function cE(){
	var sdate = document.getElementById('s_eyear')[document.getElementById('s_eyear').selectedIndex].value + 
		document.getElementById('s_emonth')[document.getElementById('s_emonth').selectedIndex].value + 
		document.getElementById('s_eday')[document.getElementById('s_eday').selectedIndex].value;
	var edate = document.getElementById('e_eyear')[document.getElementById('e_eyear').selectedIndex].value + 
		document.getElementById('e_emonth')[document.getElementById('e_emonth').selectedIndex].value + 
		document.getElementById('e_eday')[document.getElementById('e_eday').selectedIndex].value;

	if(sdate > edate){
		alert("Your event can't end before it begins, please check your dates");
		return false;
	}

	if(edate - sdate > 5){
		var t = confirm("Your event is longer than 5 days, is that correct?");
		if(!t)
			return false;
	}

	var fields = Array("cal_cats", 'title', 'body', 'location');
	for(var i=0;i<fields.length;i++){
		if(document.getElementById(fields[i]).value.length < 1){
			alert("Please fill out all fields in the form");
			return false;
		}
	}
}