function chgt(nomimage,imageutilise) 
				{ 
				  document[nomimage].src=imageutilise; 
				}
				
				function interface_pop_up(URL,LARG,HAUT,RESIZE,SCROLLING)
				{
					window.open(URL , "" ,"width="+LARG+",height="+HAUT+",resizable="+RESIZE+",scrollbars="+SCROLLING+",menubar=no,toolbar=no,directories=no,location=no,status=no");
				}
				
				
				function montre(id) 
				{
					if (document.getElementById) 
					{
						document.getElementById(id).style.display="block";
					} 
					else if (document.all) 
					{
						document.all[id].style.display="block";
					} 
					else if (document.layers) 
					{
						document.layers[id].display="block";
					}
				}
				
				function cache(id) 
				{
					if (document.getElementById) 
					{
						document.getElementById(id).style.display="none";
					}
					else if (document.all) 
					{
						document.all[id].style.display="none";
					} 
					else if (document.layers) 
					{
						document.layers[id].display="none";
					}
				}