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<!DOCTYPE html>
<html>
<body>
​
<h2>The XMLHttpRequest Object</h2>
<h3>Start typing a name in the input field below:</h3>
​
<p>Suggestions: <span id="txtHint"></span></p> 
<p>First name: <input type="text" id="txt1" onkeyup="showHint(this.value)"></p>
​
<script>
function showHint(str) {
  if (str.length == 0) { 
    document.getElementById("txtHint").innerHTML = "";
    return;
  }
  const xhttp = new XMLHttpRequest();
  xhttp.onload = function() {
    document.getElementById("txtHint").innerHTML =
    this.responseText;
  }
  xhttp.open("GET", "gethint.php?q="+str);
  xhttp.send();   
}
</script>
​
</body>
</html>
​