function webcam()
   {
if((document.getElementById("fond_wid").style.left == "499px" ) && (document.getElementById("wid_webcam2").style.display == "block")){
       document.getElementById("wid_webcam2").style.display = "none";
       document.getElementById("fond_wid").style.left = "735px";
} else {
       document.getElementById("wid_meteo2").style.display = "none";
       document.getElementById("wid_piste2").style.display = "none";
       document.getElementById("fond_wid").style.left = "499px";
       document.getElementById("wid_webcam2").style.display = "block";
}
   }

   function meteo()
   {
if((document.getElementById("fond_wid").style.left == "499px" ) && (document.getElementById("wid_meteo2").style.display == "block")){
       document.getElementById("wid_meteo2").style.display = "none";
       document.getElementById("fond_wid").style.left = "735px";
} else {
       document.getElementById("wid_webcam2").style.display = "none";
       document.getElementById("wid_piste2").style.display = "none";
       document.getElementById("fond_wid").style.left = "499px";
       document.getElementById("wid_meteo2").style.display = "block";
}
   }

   function piste()
   {
if((document.getElementById("fond_wid").style.left == "499px" ) && (document.getElementById("wid_piste2").style.display == "block")){
       document.getElementById("wid_piste2").style.display = "none";
       document.getElementById("fond_wid").style.left = "735px";
} else {
       document.getElementById("wid_webcam2").style.display = "none";
       document.getElementById("wid_meteo2").style.display = "none";
       document.getElementById("fond_wid").style.left = "499px";
       document.getElementById("wid_piste2").style.display = "block";
}
   }