function checkAvailability() {
	arrival_date=document.getElementById('arrival_date').value;
	arrival_month=document.getElementById('arrival_month').value;
	arrival_year=document.getElementById('arrival_year').value;
	
	departure_date=document.getElementById('departure_date').value;
	departure_month=document.getElementById('departure_month').value;
	departure_year=document.getElementById('departure_year').value;
	sleeps=document.getElementById('sleeps').value;

	url="http://www.rentalsystems.com/inc/search/search_results.asp?build_results=true&unbrand=True&passLoc=0&theme=0&locName=&owner=32362&rcam=searchengine&rag=32362A&dates=true&sd="+arrival_date+"&sm="+arrival_month+"&sy="+arrival_year+"&dd="+departure_date+"&dm="+departure_month+"&dy="+departure_year+"&sleeps="+sleeps
	window.open(url);
}