function position_index_ie()
	{
	if (navigator.appName=="Microsoft Internet Explorer")
		{
		//recupération de la taille de la fenêtre
		if (document.body)
			{
			var larg = (document.body.clientWidth);
			var haut = (document.body.clientHeight);
			} 
		else
			{
			var larg = (window.innerWidth);
			var haut = (window.innerHeight);
			}

		//gestion de la largeur
		if(larg<790)
			{
			document.getElementById("main").style.width="790px";
			}
		else
			{
			document.getElementById("main").style.width="100%";
			}
		}
	}

function position_ie()
	{
	if (navigator.appName=="Microsoft Internet Explorer")
		{
		//recupération de la taille de la fenêtre
		if (document.body)
			{
			var larg = (document.body.clientWidth);
			var haut = (document.body.clientHeight);
			} 
		else
			{
			var larg = (window.innerWidth);
			var haut = (window.innerHeight);
			}

		//gestion de la largeur
		if(larg<790)
			{
			document.getElementById("main").style.width="700px";
			}
		else
			{
			document.getElementById("main").style.width="86%";
			}
		}
	}


//intervertir les images
function interverti_images(num)
	{
	image_1=new Image;
	image_1.src=document.getElementById('main_image').src;

	image_2=new Image;
	image_2.src=document.getElementById(num).src;

	document.getElementById('main_image').src=image_2.src;

	document.getElementById(num).src=image_1.src;

	}