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<html>
<head>
<script>
function showHint(str)
{
    if (str.length==0)
    { 
        document.getElementById("txtHint").innerHTML="";
        return;
    }
    if (window.XMLHttpRequest)
    {
        // Code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp=new XMLHttpRequest();
    }
    else
    {    
        // Code for IE6, IE5
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function()
    {
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
            document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
        }
    }
    xmlhttp.open("GET","gethint.php?q="+str,true);
    xmlhttp.send();
}
</script>
</head>
<body>

<p><b>Type a name in the input field:</b></p>
<form> 
Name: <input type="text" onkeyup="showHint(this.value)">
</form>
<p>Return value: <span id="txtHint"></span></p>

</body>
</html>

<?php
// Fill up array with names
$a[]="Anna";
$a[]="Brittany";
$a[]="Cinderella";
$a[]="Diana";
$a[]="Eva";
$a[]="Fiona";
$a[]="Gunda";
$a[]="Hege";
$a[]="Inga";
$a[]="Johanna";
$a[]="Kitty";
$a[]="Linda";
$a[]="Nina";
$a[]="Ophelia";
$a[]="Petunia";
$a[]="Amanda";
$a[]="Raquel";
$a[]="Cindy";
$a[]="Doris";
$a[]="Eve";
$a[]="Evita";
$a[]="Sunniva";
$a[]="Tove";
$a[]="Unni";
$a[]="Violet";
$a[]="Liza";
$a[]="Elizabeth";
$a[]="Ellen";
$a[]="Wenche";
$a[]="Vicky";

// Get the q parameter from URL
$q=$_GET["q"];

// Look up all hints from array if $q is different from ""
if (strlen($q) > 0)
{
    $hint="";
    for($i=0; $i&lt;count($a); $i++)
    {
        if (strtolower($q)==strtolower(substr($a[$i],0,strlen($q))))
        {
            if ($hint=="")
            {
                $hint=$a[$i];
            }
            else
            {
                $hint=$hint." , ".$a[$i];
            }
        }
    }
}

// Output "no suggestion" if no hint was found or output correct values
echo $hint === "" ? "no suggestion" : $hint;
?>

$hint = $a[$i];
}
else
{
$hint = $hint . " , " . $a[$i];
}
}
}
}

// If no matching values are found, set the output to "no suggestion"
if ($hint == "")
{
$response = "no suggestion";
}
else
{
$response = $hint;
}

// Output the return value
echo $response;
?>