Untitled
Guest 780 28th Nov, 2019
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
function oblicz(){
var a=document.getElementById("rok").value;
var data=new Date();
var rok=data.getYear()+1900;
if(a<=rok)
{
document.getElementById("wynik").innerHTML="Twój wiek: "+(rok-a);
}
else
{
alert("Błędny rok");
}
}
</script>
</head>
<body>
<input type="number" id="rok" name="rok">
<button onClick="oblicz()">Oblicz</button>
<p id="wynik"></p>
</body>
</html>
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