function changeImage(Elem,img) {
  var myClass = "item" + Elem + "_red"; 
	var elem = document.getElementById("item" + Elem);
	elem.className = myClass;
	if (img == "img"){
  	var elem = document.getElementById("img" + Elem);
  	elem.className = "noopacity";    
  }
}

function changeImageBack(Elem,img) {
  var myClass = "item" + Elem; 
	var elem = document.getElementById("item" + Elem);
	elem.className = myClass;
	if (img == "img"){
  	var elem = document.getElementById("img" + Elem);
  	elem.className = "opacity";    
  }	
}

function changeImageSub(Elem,Elem2,img) {
  var myClass = "item" + Elem + "sub" + Elem2 + "_red"; 
	var elem = document.getElementById("item" + Elem + "sub" + Elem2);
	elem.className = myClass;
}

function changeImageSubBack(Elem,Elem2,img) {
  var myClass = "item" + Elem + "sub" + Elem2; 
	var elem = document.getElementById("item" + Elem + "sub" + Elem2);
	elem.className = myClass;
	
}
//leaflet for download
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}
function showus()
{
  deb = document.cookie.indexOf("splash" + "=")
  if (deb >= 0) {
      var fin;
      deb += 6 + 1
      fin = document.cookie.indexOf(";",deb)
      if (fin < 0) fin = document.cookie.length
      document.cookie.substring(deb,fin);
      }
   if (document.cookie.substring(deb,fin)!="nosplash"){   
     var element = document.getElementById("imgoverlay");
     var element2 = document.getElementById("overlay");
     //var element2 = document.getElementById(x2);
     var arrayPageSize = getPageSize();
  	 var arrayPageScroll = getPageScroll();	
     var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - 258) / 2);
  	 var lightboxLeft = ((arrayPageSize[0] - 20 - 166) / 2);
  
  		element.style.top = "300px";
  		element.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px"; 
      element2.style.display = "block"; 
  		element.style.display = "block";
  		/*
      element2.style.height = arrayPageSize[1]+"px";  
  		element2.style.display = "block";
  		*/
      
      var expDate = new Date()
      var jours=30;
      expDate.setTime(expDate.getTime() + (jours * 24 * 3600 * 1000))
      document.cookie = "splash" + "=" + escape("nosplash")
          + ";expires=" + expDate.toGMTString()
    }
		

}

function hideus()
{
   var element = document.getElementById("overlay");
   var element2 = document.getElementById("imgoverlay");   
 
		element.style.display = "none"; 
		element2.style.display = "none";     
}