Hi Dear all.......
i am new to ajax. I am doing an application in ajax + jsp. In my client side i have
a html file called
Ajax_Client.html
and one jsp file
getDescription.jsp.
I am giving the content of two files...
Ajax_Client.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title> 1st Ajax Application</title>
<script >
function getDescription(channelId,itemId)
{
var url = 'http://localhost:8084/Aajax/getDescription.jsp?channelId=' + channelId + '&itemId=' + itemId;
if (window.XMLHttpRequest)
{
req = new XMLHttpRequest();
}
else if (window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
}
req.onreadystatechange = processRequest;
req.open("GET", url, true);
req.send(null);
}
function processRequest() {
if (req.readyState == 4) {
alert ( "Hyee Nigam.... req.readyState="+req.readyState+" And req.status="+req.status+" is Comming form the Server" );
if (req.status == 200) {
parseMessages();
} else {
alert ( "Hyee Nigam.... Not able to retrieve description" ); }
}
}
function parseMessages() {
alert ( "Enter to the parseMessages() function" ); //--Just to print only, to check upto which line function is executing
response = req.responseXML.documentElement;
alert ( "Execution of 'response = req.responseXML.documentElement;' " ); //--Just to print only, to check upto which line function is executing
itemDescription = response.getElementsByTagName('description')[0].firstChild.data;
alert ( "Execution of 'itemDescription = response.getElementsByTagName('description')[0].firstChild.data;' " ); //--Just to print only, to check upto which line function is executing
alert ( itemDescription ); //-- To show the content from the server
alert ( "Execution Completed" );
}
</script>
</head>
<body>
<a href="/" onmouseover="getDescription(3,1)">My 1st Ajax Application<a>
</body>
</html>
getDescription.jsp
<html>
<body>
<%
String channelId = request.getParameter("channelId");
String itemId = request.getParameter("itemId");
//String description = new Channel(channelId).getItemDescription(itemId);
String description = "This is the description for the channelId: " + channelId + "and itemId: " + itemId;
if (description != null) {
response.setContentType("text/xml");
response.setHeader("Cache-Control", "no-cache");
response.getWriter().write("<description>" + description.toString() + "</description>");
} else {
//nothing to show
response.setStatus(HttpServletResponse.SC_NO_CONTE NT);
}
%>
</body>
</html>
i think its problem in the function parseMessages() in Ajax_Client.html page
Thanks
Thanks & Regard
Nigamananda Rout
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