function showDiv( div_name ) {
			etat = document.getElementById(div_name).style.display;

			if (eval("div_name") == "logos-visuels")
			{
				document.getElementById("logos-visuels").style.display = 'block';
				document.getElementById("docs-commerciaux").style.display = 'none';
				document.getElementById("images-synthese").style.display = 'none';
			}
			
			if (eval("div_name") == "docs-commerciaux")
			{
				document.getElementById("logos-visuels").style.display = 'none';
				document.getElementById("docs-commerciaux").style.display = 'block';
				document.getElementById("images-synthese").style.display = 'none';
			}
			
			if (eval("div_name") == "images-synthese")
			{
				document.getElementById("logos-visuels").style.display = 'none';
				document.getElementById("docs-commerciaux").style.display = 'none';
				document.getElementById("images-synthese").style.display = 'block';
			}
		}