function checkit(e,f) {
	if (e.which) Key = e.which;
	else Key = e.keyCode;
	if(Key==13) {
		if(f=="advconf") sub_form();
	}
} 
function sub_form() {	
	error_msg = "";	
	destination = document.getElementById("co_newd").value;
	
	conference_name = document.getElementById("co_name").value;
	
	checkin = document.getElementById("csd").value+"/"+document.getElementById("csm").value+"/"+document.getElementById("csy").value;
	checkout = document.getElementById("ced").value+"/"+document.getElementById("cem").value+"/"+document.getElementById("cey").value;
	
	if(document.getElementById("csm").value<10) hcm = "0"+document.getElementById("csm").value;
	else hcm = document.getElementById("csm").value;
	if(document.getElementById("csd").value<10) hcd = "0"+document.getElementById("csd").value;
	else hcd = document.getElementById("csd").value;
	hcy = document.getElementById("csy").value;
	
	if(document.getElementById("cem").value<10) hom = "0"+document.getElementById("cem").value;
	else hom = document.getElementById("cem").value;
	if(document.getElementById("ced").value<10) hod = "0"+document.getElementById("ced").value;
	else hod = document.getElementById("ced").value;
	hoy = document.getElementById("cey").value;
	
	chi = hcy+hcm+hcd;
	cho = hoy+hom+hod;
	
	cy = eval("year_"+hcy+"["+hcm+"][1]");
	if(hcd>cy) {error_msg += "<li>Please Check your dates. "+calendar_months_array[document.getElementById("csm").value-1]+" "+hcy+" have "+cy+" days </li>";} 
		
	co = eval("year_"+hoy+"["+hom+"][1]");;
	if(hod>co) {error_msg += "<li>Please Check your dates. "+calendar_months_array[document.getElementById("cem").value-1]+" "+hoy+" have "+co+" days </li>";} 
	
	if(chi>=cho && (hod!=0 || hcd!=0)) {error_msg +="<li>Please Check your dates. Checkin must be less than checkout</li>";} 
	
	if(hcd==0 || hcd=="") checkin="";
	if(hod==0 || hod=="") checkout="";
	
	destination_id = document.getElementById("cod_id").value;
		
	if(destination_id!="") destination="";
		
	persatt = document.getElementById("cnupers").value;
	room = document.getElementById("cmainr").value;
	persroom = document.getElementById("cnuperr").value;
	break_room = document.getElementById("cbreakr").value;
	
	if(destination_id=="") {
		if(destination=="" && conference_name=="") { error_msg += "<li>Please Specify a Destination or a Conference Centre name</li>";} 
		if(destination.length < 3 && conference_name=="") { error_msg += "<li>The Destination must have at least 3 characters</li>";} 
	}
	
	if(error_msg!="") { open_error_win(error_msg); return false;}
	else return true;
}