var mouseX = 0;
var mouseY = 0;
if (document.layers) 
document.captureEvents(Event.MOUSEMOVE);
document.onmousemove = getCursor; 
function getCursor(e) {
if (document.all) {
mouseX = event.clientX + document.body.scrollLeft;
mouseY = event.clientY + document.body.scrollTop;
}
else
{
  if (document.getElementById) {
  mouseX = e.pageX;
  mouseY = e.pageY;
  }
}
}

function livello_vis(idel, widthimg, heightimg){
//alert(idel);
var rpx, rpy, x1, y1, vx, vy;
var lar, alt;
lar = (document.body.clientWidth / 2) - 150;
alt = 200;
x1 = 460;
y1 = 200;
//x1 = (widthimg / 2);
//x1 = (heightimg / 2);
  if (document.all){
  vx = mouseX  + document.body.scrollLeft - x1;
  vy = document.body.scrollTop + 50;
  //alert(vy);
   if (vy < 0){
   vy = 0;
   }
   if (vx < 0){
   vx = 0;
   }  
  document.getElementById(idel).style.pixelLeft = vx;
  document.getElementById(idel).style.pixelTop = vy;
  document.getElementById(idel).style.visibility = "visible";

  }
  
  else
  {
    if (document.layers){
    //bx = (window.innerWidth / 2) - 350;
    document.idel.left = mouseX  - x1;
	 document.idel.top = mousey - y1;
    }
    else
    {
      if(document.getElementById) {
	  
	  //vx = mouseX  + document.body.scrollLeft - x1;
      //vy = document.body.scrollTop + y1;
      document.getElementById(idel).style.left = lar + "px";
	  document.getElementById(idel).style.top = alt + document.body.scrollTop + "px" ;
	  document.getElementById(idel).style.visibility = "visible";
      }
    }
  }
}

function visibile_ev2(idel){
var rpx, rpy, x1, y1, vx, vy;
  if (document.all){
  vx = 200;
  vy = document.body.scrollTop + 30;
  document.getElementById(idel).style.pixelLeft = vx;
  document.getElementById(idel).style.pixelTop = vy;
  document.getElementById(idel).style.visibility = "visible";

  }
  
  else
  {
    if (document.layers){
    //bx = (window.innerWidth / 2) - 350;
    rpx = (mouseX / window.innerWidth);
	rpy = (mouseY / window.innerHeight);
	x1 = (widthimg * rpx);
	y1 = (heightimg * rpy);
    document.idel.left = mouseX  - x1;
	document.idel.top = mousey - y1;
    }
    else
    {
      if(document.getElementById) {
	  vx = 200;
      vy = document.body.scrollTop + 30;
      if (vy < 0){
      vy = 0;
      }
      if (vx < 0){
      vx = 0;
      }  
      document.getElementById(idel).style.left = vx;
	  document.getElementById(idel).style.top = vy;
	  document.getElementById(idel).style.visibility = "visible";
      }
    }
  }
}

function livello_no_vis(idel){
document.getElementById(idel).style.visibility = "hidden";
cc(idel, 'livello_img.php?id=vuoto.gif');
}

function vismes(idmes){
document.getElementById("contau").style.visibility = "hidden";
document.getElementById("conten").style.visibility = "hidden";
document.getElementById("conttr").style.visibility = "hidden";
document.getElementById(idmes).style.visibility = "visible";
document.getElementById(idmes).style.left = mouseX - 280;
document.getElementById(idmes).style.top = mouseY - 280;
}

function mostra_freccia(idel){
var img;
if (idel == "id_imgsx"){
img = "url('img/freccia_sx.gif') no-repeat left";
}

if (idel == "id_imgdx"){
img = "url('img/freccia_dx.gif') no-repeat right";
}

document.getElementById(idel).style.opacity = 0.80;
document.getElementById(idel).style.filter = "alpha(opacity:80)";
document.getElementById(idel).style.background = img;
}

function nascondi_freccia(idel){
var img;
if (idel == "id_imgsx"){
img = "green";
}

if (idel == "id_imgdx"){
img = "red";
}

document.getElementById(idel).style.background = "white";
document.getElementById(idel).style.opacity = 0;
document.getElementById(idel).style.filter = "alpha(opacity:0)";
}