function set_reservation_date(date, duration, chalet, number)
		{
			
			document.getElementById('elemForm1').value = date
			var e = document.getElementById('week_duration').childNodes
			var length = e.length
			document.getElementById('week_duration').value = 1
			
			document.getElementById('idchalet').value = chalet
			document.getElementById('idchalet_num').value = number
			
			for(var i = 0; i<length; ++i)
			{
				if(e[i].style)
					if(e[i].value > duration) e[i].style.display = 'none' 
					else e[i].style.display = '' 
			}
		}