<script>
function short(url) {
document.getElementById("shortUrl").value = url;
};
</script>
<input type="text" id="shortUrl" style="text-align:center;">
<script src="http://shrt.org.ua/--?url=http://vk.com&s=clck.ru&callback=short"></script>
<script>
document.getElementById("shortUrl").onclick = function() {
this.select();
}
</script>
Средний
