version = navigator.appVersion.toLowerCase();
agent = navigator.userAgent.toLowerCase();
ie = (version.indexOf('msie')>-1);
ie50 = (version.indexOf('msie 5.0')>-1);
win = (version.indexOf('windows')>-1);
opera = (agent.indexOf('opera')>-1);

function open_new(w,h) {
o = window.open('','JSL','toolbar=0,location=0,scrollbars=yes,width='+w+',height='+h+',resizable=1,top=20,left=20');
o.focus();
}


function open_new_center(w,h)
{
 o = window.open('','JSL','toolbar=0,location=0,scrollbars=no,width='+w+',height='+h+',resizable=1,top='+(screen.height-h)/2+',left='+(screen.width-w)/2);
o.focus();
}


function open_new_window(w,h)
{
 o = window.open('','JSL','toolbar=0,location=0,scrollbars=1,width='+w+',height='+h+',resizable=1,top='+(screen.height-h)/2+',left='+(screen.width-w)/2);
o.focus();
}

function setWindow() {
    var im = document.getElementById("img");
    imgx = im.width;
    imgy = im.height;
    if(imgx > 984)  { imgx = 1024; } else { imgx += 40; }
    if(imgy > 723) { imgy = 768; }  else { imgy += 75; }
    if(ie){imgy+=50;}
    window.resizeTo(imgx, imgy)
}

function otevriOkno(url, jmeno, w, h) {  
  popupWin = window.open(url, jmeno, 'resizable=1,top=20,left=20,menubar=0,scrollbars=no,width=' + w + ',height=' + h);
}