function zobrazSkryj(idecko){
el=document.getElementById(idecko).style; 
el.display=(el.display == 'block')?'none':'block';
}

  
function vyplnit () {
  var p1u1 = document.formular['cenaP1U1[1]'].value;
  var p1u2 = document.formular['cenaP1U2[1]'].value;
  var p2u1 = document.formular['cenaP2U1[1]'].value;
  var p2u2 = document.formular['cenaP2U2[1]'].value;

  for (i=2; i <= 20; i++) {
    document.formular['cenaP1U1['+i+']'].value=p1u1;
    document.formular['cenaP1U2['+i+']'].value=p1u2;
    document.formular['cenaP2U1['+i+']'].value=p2u1;
    document.formular['cenaP2U2['+i+']'].value=p2u2;
  }
}
  
function potvrzeniprechodu(message, url){
	if(confirm(message)) location.href = url;
}