Re: run jsp on javascript event

From:
"polilop" <fmatosicSKINI@inet.hr>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 21 Nov 2007 14:43:40 +0100
Message-ID:
<fi1cme$oeh$1@ss408.t-com.hr>
<bbembi_de@lycos.de> wrote in message
news:8af91d17-fcc1-468c-8336-2d33d44eeded@v4g2000hsf.googlegroups.com...

On 21 Nov., 12:37, "polilop" <fmatosicSK...@inet.hr> wrote:

<bbembi...@lycos.de> wrote in message

news:18c5a0bd-58c6-4683-9150-356fe85a817a@e4g2000hsg.googlegroups.com...>
Hello everyone,

I am using an javascript table. if I edit a cell I want to write the
new value in the DB with jsp.

How can I do that?

I would like to call a jsp in background if that is possible.
Or are there any other possibilities?

bye juergen


You can do this with AJAX.


Please give me a little example. I am totally new with AJAX.
I use an AJAX component as table: dhtmlxGrid.

bye juergen


you will need to learn about AJAX before.
looka at http://www.w3schools.com/ajax/default.asp
or at:
http://www.ajaxtutorial.net/index.php/2006/03/08/simple-ajax-functions-snippets/
Allso look at ajax prototype, might be helpful

here is what i use for simple ajax requests (found it on the web but was
unable to find the page again):
ajaxUpdate( 'display', '/myUpdate.do',
{params:'value='+document.getElementById('myValue').value,async:false,startfunc:'loadingMessage();'
 });

elemid=id of element that will receive the return information
url =url of the servlet that will make the update eg. myServletUpdate
options = you put options in{} like this, startfunc is if you need to run a
function before the ajax call.

function ajaxUpdate( elemid, url, options )

{

var params = options.params || "";

var meth = options.meth || "post";

var async = options.mode || true;

var startfunc = options.startfunc || "";

var endfunc = options.endfunc || "";

var errorfunc = options.errorfunc || "";

var req = false;

params = params+"&random="+Math.round(10000*Math.random());

//Enkoding for utf-8 do not use if page allready in utf-8

params=encodeURI(params)

//alert(params);

try {

req = new XMLHttpRequest();

} catch(e1) {

try {

req= new ActiveXObject("Microsoft.XMLHTTP");

} catch(e2) {

try {

req = new ActiveXObject("Msxml2.XMLHTTP");

} catch(e3) {

return false;

}

}

}

if( startfunc != "" )

eval( startfunc );

req.open( meth, url+( params != "" ? "?"+params : "" ), async );

req.setRequestHeader( "Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8" );

req.onreadystatechange =

function()

{

if ( req.readyState == 4 )

{

if ( req.status == 200 )

{

hideMessage();

document.getElementById(elemid).innerHTML = req.responseText;

if( endfunc != "" )

eval( endfunc );

return true;

}

else

{

hideMessage();

if( endfunc != "" )

eval( endfunc );

if( errorfunc != "" )

eval( errorfunc );

return false;

}

}

};

req.send(null);

}

Hope this helps.

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