function monterTableau(  im1,im2,im3,im4)
{	
	
if(document.images.im1 != null && document.images.im2 != null && document.im3 != null && document.img4 != null)
{
document.images.im1.src="../Images2/" + im1+ '.jpg'
document.images.im2.src="../Images2/" +im2+ '.jpg'
document.images.im3.src="../Images2/" +im3+ '.jpg'
document.images.im4.src="../Images2/" +im4+ '.jpg'

    for (i=1;i<=4;i++)
    {	base = eval("im"+i)
	    switch ( base )
	    { 
	      case "sport": valeur="Sport";break;
	      case "vetement":valeur="Vêtement";break;
	      case "environnement":valeur="Environnement";break;
	      case "medecine":valeur="Médecine";break;
	      case "industriel":valeur="Industriel";break;
	      case "agriculture":valeur="Agriculture";break;
	      case "construction":valeur="Construction";break;
	      case "geniecivil":valeur="Génie civil";break;
	      case "emballage":valeur="Emballage";break;
	      case "mobilier":valeur="Mobilier";break;
	      case "transport":valeur="Transport";break;
	      case "protection":valeur="Protection";break;
	    }
	    document.all["t"+i].innerText=valeur;	
    }	
   }
}

function afficher( lequel )
{ document.all["t"+ lequel].style.display='block'
}

function masquer()
{ document.all["t1"].style.display='none'
  document.all["t2"].style.display='none'
  document.all["t3"].style.display='none'
  document.all["t4"].style.display='none'
}

function tirerHasard()
{
	var n;
	
	n= Math.round( (Math.random() * 10000) %7 )
	
	switch (n)
	{
	case 0:
	    monterTableau( "sport","construction","vetement","environnement");break;
	case 1:
	    monterTableau( "medecine","geniecivil","industriel","agriculture");break;
	case 2:
	    monterTableau( "emballage","mobilier","transport","protection");break;
	case 3:
	    monterTableau( "transport","sport","construction","mobilier");break;
	case 4:
	    monterTableau( "agriculture","vetement","geniecivil","emballage");break;
	case 5:
	    monterTableau( "environnement","industriel","transport","sport");break;
	case 6:
	    monterTableau( "vetement","protection","emballage","medecine");break;
	
	}
}