AJAX Example Detailed Explanation
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The Complete JavaScript and HTML File
Code for the complete html file is given below:-
<html>
<head>
<script type="text/JavaScript"><script
type="text/javascript" language="JavaScript1.4">
var xmlHttp
function showHint(str)
{
if (str.length==0)
{
document.getElementById("txtHints").innerHTML=""
return
}
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
}
var url="gethint.php"
url=url+"?q="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("txtHints").innerHTML=xmlHttp.responseText
}
}
function GetXmlHttpObject()
{
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}
</script>
</head>
<body>
<form>
First Name:
<input type="text" id="txtSample"
onkeyup="showHint(this.value)">
</form>
<p>Suggestions: <span id="txtHints"></span></p>
</body>
</html> |
getHint.php File
gethint.asp file is called each time a user enters a
character into the text box. Here is the full gethint.php
file.
<?php
// Fill up array with names
$a[]="Anna";
$a[]="Binu";
$a[]="Cicily";
$a[]="Diana";
$a[]="Eva";
$a[]="Flonor";
$a[]="Gunda";
$a[]="Hege";
$a[]="Inga";
$a[]="Johanna";
$a[]="Kirty";
$a[]="Linda";
$a[]="Nina";
$a[]="Ophelia";
$a[]="Shimna";
$a[]="Amanda";
$a[]="Raquel";
$a[]="Cindy";
$a[]="Dolly";
$a[]="Eve";
$a[]="Evita";
$a[]="Sunitha";
$a[]="Thampy";
$a[]="Unni";
$a[]="Violet";
$a[]="Liza";
$a[]="Elizabeth";
$a[]="Ellen";
$a[]="Wenche";
$a[]="Vinu";
//get the q parameter from URL
$q=$_GET["q"];
//lookup all hints from array if length of q>0
if (strlen($q) > 0)
{
$hint="";
for($i=0; $i<count($a); $i++)
{
if (strtolower($q)==strtolower(substr($a[$i],0,strlen($q))))
{
if ($hint=="")
{
$hint=$a[$i];
}
else
{
$hint=$hint." , ".$a[$i];
}
}
}
}
// Set output to "no suggestion" if no hint where found
// or to the correct values
if ($hint == "")
{
$response="no suggestion";
}
else
{
$response=$hint;
}
//output the response
echo $response;
?>
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Make one html file and one php file and try your luck!
Next -> AJAX ASP Scripting . |
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