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function okno(url) {
var text = document.createTextNode('Chcete opustiť túto stránku?');
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document.getElementById('okno').parentNode.removeChild(document.getElementById('okno'));
}
var div = document.createElement('div');
div.id = 'okno';
div.style.position = 'fixed';
div.style.width = '500px';
div.style.height = '80px';
div.style.border = '1px solid #000';
div.style.padding = '10px';
div.style.left = '50%';
div.style.top = '50%';
div.style.marginLeft = '-261px';
div.style.marginTop = '-51px';
var form = document.createElement('form');
form.action = url;
form.method = 'get';
var btn = document.createElement('button');
btn.style.position = 'absolute';
btn.style.bottom = '10px';
btn.style.right = '10px';
btn.innerHTML = 'Pokračovať';
form.appendChild(btn);
div.appendChild(text);
div.appendChild(form);
document.body.appendChild(div);
}
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