function popup(myFile,myWidth,myHeight) {
var top=(screen.height-myHeight)/2;
var left=(screen.width-myWidth)/2;
window.open(myFile,'','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width='+myWidth+',height='+myHeight+',left='+left+',top='+top);
}

function visible1()
      {
	  document.getElementById("liste1").style.display = "block";
	  document.getElementById("liste2").style.display = "none";
	  document.getElementById("liste3").style.display = "none";
	  document.getElementById("liste4").style.display = "none";
	  document.getElementById("liste5").style.display = "none";
	  document.getElementById("liste6").style.display = "none";
      }
	  
function visible2()
      {
	  document.getElementById("liste1").style.display = "none";
	  document.getElementById("liste2").style.display = "block";
	  document.getElementById("liste3").style.display = "none";
	  document.getElementById("liste4").style.display = "none";
	  document.getElementById("liste5").style.display = "none";
	  document.getElementById("liste6").style.display = "none";
      }

function visible3()
      {
	  document.getElementById("liste1").style.display = "none";
	  document.getElementById("liste2").style.display = "none";
	  document.getElementById("liste3").style.display = "block";
	  document.getElementById("liste4").style.display = "none";
	  document.getElementById("liste5").style.display = "none";
	  document.getElementById("liste6").style.display = "none";
      }
function visible4()
      {
	  document.getElementById("liste1").style.display = "none";
	  document.getElementById("liste2").style.display = "none";
	  document.getElementById("liste3").style.display = "none";
	  document.getElementById("liste4").style.display = "block";
	  document.getElementById("liste5").style.display = "none";
	  document.getElementById("liste6").style.display = "none";
      }
function visible5()
      {
	  document.getElementById("liste1").style.display = "none";
	  document.getElementById("liste2").style.display = "none";
	  document.getElementById("liste3").style.display = "none";
	  document.getElementById("liste4").style.display = "none";
	  document.getElementById("liste5").style.display = "block";
	  document.getElementById("liste6").style.display = "none";
      }
function visible6()
      {
	  document.getElementById("liste1").style.display = "none";
	  document.getElementById("liste2").style.display = "none";
	  document.getElementById("liste3").style.display = "none";
	  document.getElementById("liste4").style.display = "none";
	  document.getElementById("liste5").style.display = "none";
	  document.getElementById("liste6").style.display = "block";
      }