var type = "IE"; // Variable used to hold the browser name

detectBrowser();

function detectBrowser() {
  if (window.opera && document.readyState) {
    type="OP"; // The surfer is using Opera of some version
  } else if (document.all) {
    type="IE"; // The surfer is using IE 4+
  } else if (document.layers) {
    type="NN"; // The surfer is using NS 4
  } else if (!document.all && document.getElementById) {
    type="MO"; // The surfer is using NS6+ or Firefox
  } else {
    type="IE"; // I assume it will not get here
  }
}

function showLayer(id, action) {
  if (type=="IE") {
    eval("document.all." + id + ".style.visibility='" + action + "'");
  }
  if (type=="NN") {
    eval("document." + id + ".visibility='" + action + "'");
  }
  if (type=="MO" || type=="OP") {
    eval("document.getElementById('" + id + "').style.visibility='" + action + "'");
  }
}

function nrcIE() {
  if (document.all) { return false; }
}

function nrcNS(e) {
  if(document.layers || (document.getElementById && !document.all)) { 
    if (e.which==2 || e.which==3) { return false; }
  }
}

function sidebarBlocks() {
  if (document.layers) {
    document.captureEvents(Event.MOUSEDOWN);
    document.onmousedown=nrcNS;
  } else {
    document.onmouseup=nrcNS;
    document.oncontextmenu=nrcIE;
  }
  document.oncontextmenu=new Function("value=showLayer('actions','visible'); return false");
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function popImage(img, title) { 	
  picfile = new Image(); 
  picfile.src =(img); 
  fileCheck(img, title); 
}

function fileCheck(img, title) { 	
  if( (picfile.width!=0) && (picfile.height!=0) ) {
    makeWindow(img, title); 
  } else {
    funzione="fileCheck('"+img+"')"; 
    intervallo=setTimeout(funzione, 50); 
  }
}

function makeWindow(img, title) { 	
  wd = picfile.width; 
  ht = picfile.height;

  var isIE = (navigator.appName.indexOf("Microsoft") != -1) ? 1 : 0;
  var args = "resizable=yes";
  if (window.screen) { 
    var avwd = screen.availWidth;
    var avht = screen.availHeight; 

    if (avwd < wd || avht < ht) { args += ",scrollbars=yes"; }

    var xcen = (avwd > wd) ? (avwd - wd) / 2 : 0; 
    var ycen = (avht > ht) ? (avht - ht) / 2 : 0;
    args += ",left=" + xcen + ",screenX=" + xcen;
    args += ",top=" + ycen + ",screenY=" + ycen; 	

    if (avwd < wd) { 
      wd = avwd;
      if (isIE) wd -= 12;
    }
    if (avht < ht) {
      ht = avht;
      if (isIE) ht -= 32;
    }
  }
  args += ",width=" + wd + ",innerWidth=" + wd;
  args += ",height=" + ht + ",innerHeight=" + ht;

  popwin = window.open("","_blank",args);
  popwin.document.open();
  popwin.document.write('<html><head><title>'+title+'</title></head><body style="margin:0px"><img src="'+img+'" border="0"></body></html>');
  popwin.document.close();
}
