function maj_modeles()
{
	document.getElementById('Modeles').disabled = true;
	if (document.getElementById('Marques').value != '0')
	{
		retour = ajaxPOST("ajax.php", "recup_modeles="+document.getElementById('Marques').value);
		retour = retour.split('|');
		document.getElementById('Modeles').options[0] = new Option("--- Modèle ---", "0");
	    nbr = 1;
		if (retour != "")
		{
			nbr = retour.length+1;
		}
		document.getElementById('Modeles').options.length = nbr;
		for (i=0; i<retour.length; i++)
		{
			if (document.getElementById('Modeles').options[i+1])
			{
				document.getElementById('Modeles').options[i+1].value = retour[i];
				document.getElementById('Modeles').options[i+1].text = retour[i];
			}
		}
	    document.getElementById('Modeles').options.selectedIndex = 0;
		document.getElementById('Modeles').disabled = false;
	}
}

window.onload = function()
{
	setCorps();
	setFooter();
};

window.onresize = function()
{
	setCorps();
	setFooter();
};

function setCorps()
{
	document.getElementById('corps_td').style.height = (getWindowHeight()-(document.getElementById('entete').offsetHeight+document.getElementById('pied').offsetHeight))+"px";
}

function setFooter()
{
    if (document.getElementById) 
	{
        var windowHeight=getWindowHeight();
        if (windowHeight>0)
		{
			var contentHeight=document.getElementById('entete').offsetHeight+document.getElementById('corps_td').offsetHeight;
			var footerElement=document.getElementById('pied');
			var footerHeight=footerElement.offsetHeight;
			if (windowHeight-(contentHeight+footerHeight)>=0)
			{
				footerElement.style.position='relative';
				footerElement.style.top=(windowHeight-(contentHeight+footerHeight))+'px';
			}
			else
			{
				footerElement.style.position='static';
			}
       }
    }
}

function getWindowHeight()
{
    var windowHeight=0;
    if (typeof(window.innerHeight)=='number') // firefox
	{
        windowHeight = window.innerHeight;
	    return windowHeight - 36;
    }
    else
	{
	    if (document.documentElement && document.documentElement.clientHeight)
		{
			windowHeight = document.documentElement.clientHeight;
	    }
	    else
		{
			if (document.body && document.body.clientHeight)
			{
				windowHeight = document.body.clientHeight;
			}
	    }
		return windowHeight - 36;
    }
}

function ajaxPOST(fichier, variables, async)
{
	asyn = false;
	if (async)
	{
		asyn = true;
	}
	if (window.XMLHttpRequest) // Firefox
	{
		xhr_object = new XMLHttpRequest();
	}
	else if (window.ActiveXObject) // Internet Explorer
	{
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else
	{
		return(false);
	}
	xhr_object.open("POST", fichier, asyn);
	xhr_object.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	xhr_object.send(variables);

	if (async)
	{
		xhr_object.onreadystatechange = function()
		{
			if (xhr_object.readyState == 4) // code asynchrone
			{
			}
			else
			{
				return(false);
			}
		}
	}
	else
	{
		if (xhr_object.readyState == 4)
		{
			/*if (fichier.indexOf("concerts") > -1)
			{
				initacc();
				window.addEvent('domready', Lightbox.init.bind(Lightbox));
			}
			if (fichier.indexOf("gallerie") > -1)
			{
				hs.addEventListener(window, 'load', hs.preloadImages);
			}*/
			return(xhr_object.responseText);
		}
		else
		{
			return(false);
		}
	}
}