var win = null;

function NewWindow(mypage,myname,w,h,scroll){

LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;

TopPosition = (screen.height) ? (screen.height-h)/2 : 0;

settings =

'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable=no'

win = window.open(mypage,myname,settings)

if(win.window.focus){win.window.focus();}
}

function ochrany_soucet() {
  document.getElementById('ochrana').value = (5*5)+(125/5)-(5*4);
  document.getElementById('ochrana2').style.display = 'none'; 
}