var detect = navigator.userAgent.toLowerCase();
var OS,browser,version;
var version,total,thestring;

function CenteredOpenWin(linka,win_w,win_h,name,scroll)
 {
   DetectBrowser();
   var sw=screen.width;
   var sh=screen.height;
   maxw=sw-30;
   maxh=sh-100;
   if (sw==800)  { maxw=780; }		if (sh==600)  { maxh=520; }
   if (sw==1024) { maxw=1000; }		if (sh==768)  { maxh=680; }


   size=new Array(win_w,win_h);
   size=calc(size,maxw,maxh,maxw/maxh);
   win_w=size[0];
   win_h=size[1];
//   alert(win_w);  alert(win_h);

   if (browser=="Internet Explorer")  { win_w=win_w-4; win_h=win_h-3; }
    // nem akkora ablakot nyit meg mint kene
   if (scroll!="yes") { scroll="no"; }
   var settings="scrollbars="+scroll+",width="+win_w+",height="+win_h+",";
   var bal_felso_x=(sw-win_w)/2-5; 
   var bal_felso_y=((sh-60)-win_h)/2;
   if (browser=="Netscape Navigator")
    { settings+="screenX="+bal_felso_x+",screenY="+bal_felso_y; } else
    { settings+="left="+bal_felso_x+",top="+bal_felso_y; } 
/*
   alert(linka);
   alert(settings);
   alert(name);
*/
   x=window.open(linka,name,settings);
 }

function CenteredOpenWin2(linka,win_w,win_h,name,scroll)
 {
   DetectBrowser();
   var sw=screen.width;
   var sh=screen.height;
   maxw=sw-30;
   maxh=sh-100;

   if (sw==800)  { maxw=780; }		if (sh==600)  { maxh=520; }
   if (sw==1024) { maxw=1000; }		if (sh==768)  { maxh=680; }

   size=new Array(win_w,win_h);
 //  size=calc(size,maxw,maxh,maxw/maxh);
   if (win_w>maxw) 
    { 
	   win_w=maxw; 
    }
   if (win_h>maxh) 
    {   	win_h=maxh; 
   }

   win_w=parseInt(win_w)+20 //scrollbar
   win_h=parseInt(win_h)+10 //scrollbar
//   alert(win_w);  alert(win_h);

   if (browser=="Internet Explorer")  { win_w=win_w-4; win_h=win_h-3; }
    // nem akkora ablakot nyit meg mint kene
   if (scroll!="no") { scroll="yes"; }
   var settings="scrollbars="+scroll+",width="+win_w+",height="+win_h+",";
   var bal_felso_x=(sw-win_w)/2-5; 
   var bal_felso_y=((sh-60)-win_h)/2;
   if (browser=="Netscape Navigator")
    { settings+="screenX="+bal_felso_x+",screenY="+bal_felso_y; } else
    { settings+="left="+bal_felso_x+",top="+bal_felso_y; } 
/*
   alert(linka);
   alert(settings);
   alert(name);
*/
   x=window.open(linka,name,settings);
 }

 function calc(size,MAX_WIDTH,MAX_HEIGHT,MAX_AR)
  {
//    echo "<pre>";
    w=size[0]; h=size[1];
//    w=2000; h=100;
//    var_dump(size);
    ar=w/h;
//    echo "AR ".ar;
 
    if ( (w>MAX_WIDTH) || (h>MAX_HEIGHT) )
      {
         if (ar<MAX_AR)
          {
            w=Math.round(w*(MAX_HEIGHT/h));
            h=MAX_HEIGHT;
          } else
          {
            h=Math.round(h*(MAX_WIDTH/w));
            w=MAX_WIDTH;
          }
      }
    var newsize=new Array();
    newsize[0]=w;
    newsize[1]=h;
    return newsize;
  }


function DetectBrowser()
 {

   if (checkIt('konqueror'))
    {
      browser = "Konqueror";
      OS = "Linux";
    } else if (checkIt('safari')) browser = "Safari"
      else if (checkIt('omniweb')) browser = "OmniWeb"
      else if (checkIt('opera')) browser = "Opera"
      else if (checkIt('webtv')) browser = "WebTV";
      else if (checkIt('icab')) browser = "iCab"
      else if (checkIt('msie')) browser = "Internet Explorer"
      else 
       if (!checkIt('compatible'))
        {
          browser = "Netscape Navigator"
	  version = detect.charAt(8);
        }
         else 
        {
          browser = "An unknown browser";
        }

   if (!version) version = detect.charAt(place + thestring.length);
   if (!OS)
    {
      if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS="an unknown operating system";
    }
 }

function checkIt(string)
 {
   place = detect.indexOf(string) + 1;
   thestring = string;
   return place
 }