img1=new Image();
        img2=new Image();
              
        img1.src="images/btn-retour2.gif";
        img2.src="images/btn-contact2.gif";
        
        
         
        function chgt(nomimage,imageutilise) 
				{ 
				  document.getElementById(nomimage).src=imageutilise;  
				}
				
				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";
					}
				}
				
				function box(id) 
				{
					if (document.getElementById) 
					{
					  
						if (document.getElementById(id).style.display=='block')
						{
						  document.getElementById(id).style.display="none";
						}
						else
						{
						  document.getElementById(id).style.display="block";
						}
						
					} 
					else if (document.all) 
					{
					  
						if (document.all[id].style.display=='block')
						{
						  document.all[id].style.display="none";
						}
						else
						{
						  document.all[id].style.display="block";
						}
						
					} 
					else if (document.layers) 
					{
					  
						if (document.layers[id].display=='block')
						{
						  document.layers[id].display="none";
						}
						else
						{
						  document.layers[id].display="block";
						}
						
					}
				}
				
				function chiffres(event)
        {
          // Compatibilité IE / Firefox
          if(!event&&window.event)
          {
            event=window.event;
          }

          // IE
          if(event.keyCode < 48 || event.keyCode > 57)
          {
            event.returnValue = false;
            event.cancelBubble = true;
          }

          // DOM
          if(event.which < 48 || event.which > 57)
          {
            event.preventDefault();
            event.stopPropagation();
          }
        }
				
			  function imprime() 
			  {
			    if (typeof(window.print) != 'undefined')
			    { 
			      window.print(); 
			    }
			  }