function displayPage(pageOn, pageOff){
dgbi('page_'+pageOff).style.display = 'none';
dgbi('li_page_'+pageOff).className='off';


dgbi('page_'+pageOn).style.display = 'block';
dgbi('li_page_'+pageOn).className='on';

}


      function afficheImage(sujet,srcImage){
      var newImage = new Image();
      newImage.src = srcImage;
      hauteur = newImage.height; largeur = newImage.width;

	//alert(src);
      if (largeur > 250){
      var ratioHauteur = largeur/250;
      hauteur = hauteur / ratioHauteur;

      }
         
     if(hauteur > 188){
      var marginTop=hauteur/2;
      dgbi('image_'+sujet).className="image_type5_center";
      dgbi('image_'+sujet).style.marginTop="-"+marginTop+"px";
      dgbi('image_'+sujet).style.position='relative';
      }
      if(hauteur < 188){
      dgbi('image_'+sujet).className="image_type5_center";
      dgbi('image_'+sujet).style.marginTop="-"+hauteur/2+"px";
      dgbi('image_'+sujet).style.position='relative';
      }
      if(hauteur == 188){
      dgbi('image_'+sujet).className="image_type5";
      dgbi('image_'+sujet).style.marginTop='';
      dgbi('image_'+sujet).style.position='';
      }
      dgbi('image_'+sujet).src=srcImage;
}

function displayInvent(id){
dgbi('inventoryProduct'+id).style.display='block';
}



function navigation(idNav){
      tabNavigation = getElementsByClassName('navigation');
      for (i=0; i < tabNavigation.length; i++){
      tabNavigation[i].style.display='none';
      }
      dgbi('menu_etablissement_i').className='background_color3';
      dgbi('menu_etablissement_d').className='background_color3';
      dgbi('menu_etablissement_o').className='background_color3';
      dgbi('navigation_'+idNav).style.display='block';
      dgbi('menu_etablissement_'+idNav).className='background_color2';
      }
      if (typeof nav != "undefined"){
      if(nav!=''){navigation(nav)}
      }

Event.observe(window, 'load', function() {
 afficheImage("box",urlFirst);
});