Question

problem in the ajax code.

Asked by: designersx

http.open('get',   ,true); // here is the problem

i have 2 files named 2.php and 2.js . i am using ajax here. now in 2.php u can see that i have a code in which when the user selects the option from the dropdown then it will go to the respective page,

1) now i want that if the user selects the option like products and click on go then produxts.php page should open with the help of ajax, so what should i write in http.open('get','?????',true).

2.php
<script type="text/javascript" language="javascript" src="2.js"></script>
 
<script type="text/javascript">
        function redirect_page(){
                var SelectedMenu = document.getElementById('menu');     
				var page = SelectedMenu.options[SelectedMenu.selectedIndex].value;      
	            var text = SelectedMenu.options[SelectedMenu.selectedIndex].text;
				document.location = page;
                return false;
        }
</script>
 
<form method="post" onsubmit="return redirect_page()">
<select id="menu" name="menu">
       <option value="" selected="selected">Select</option>
        <option value="new.php" title="create new">create new</option>
		<option value="products.php" title="Products">Products</option>
		<option value="services.php" title="Services">Services</option>
</select>
<input type="submit" name="submit" value="Go">
</form>
 
 
2.js
function createObject() {
	var request_type;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
		request_type = new ActiveXObject("Microsoft.XMLHTTP");
	} else{
		request_type = new XMLHttpRequest();
	}
	return request_type;
}
var http = createObject();
 
function redirect_page(){
	alert("hi")
	http.open('get', ??????  ,true); // here is the problem
	http.onreadystatechange = function(){
		if(http.readyState == 4){
			var response = http.responseText;
			//alert(response)
			document.getElementById('login_response1').innerHTML = response;
			document.getElementById('login_response2').innerHTML = text;
			}
		}
	http.send(null);
}

                                  
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Asked On
2009-07-03 at 22:10:26ID24543485
Topics

Asynchronous Javascript and XML (AJAX)

,

JavaScript

,

PHP Scripting Language

Participating Experts
1
Points
250
Comments
29

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Answers

 

by: OpalelementPosted on 2009-07-03 at 22:16:30ID: 24775826

document.getElementById('menu').options[document.getElementById('menu').selectedIndex].value

 

by: designersxPosted on 2009-07-03 at 22:25:47ID: 24775875

where i need to write this line , please tell me sir

 

by: designersxPosted on 2009-07-03 at 22:38:18ID: 24775920

Opalelement: sir u have rewrite the code which i have already done. this is not what i was asking for sir...

 

by: designersxPosted on 2009-07-03 at 22:40:04ID: 24775928

i want to say the pages should not get posted and then the user should be redirected to the respective page with what he has chosen and click son the go button.

 

by: designersxPosted on 2009-07-03 at 22:40:41ID: 24775931

hope that u have go my point.

 

by: OpalelementPosted on 2009-07-03 at 22:41:53ID: 24775937

That line goes in the ajax open (see line 40).

What it does is gets the option that is selected and then takes the value. Since the value of the options is the page, it should work as-is.

2.php
<script type="text/javascript" language="javascript" src="2.js"></script>
 
<script type="text/javascript">
        function redirect_page(){
                var SelectedMenu = document.getElementById('menu');     
                                var page = SelectedMenu.options[SelectedMenu.selectedIndex].value;      
                    var text = SelectedMenu.options[SelectedMenu.selectedIndex].text;
                                document.location = page;
                return false;
        }
</script>
 
<form method="post" onsubmit="return redirect_page()">
<select id="menu" name="menu">
       <option value="" selected="selected">Select</option>
        <option value="new.php" title="create new">create new</option>
                <option value="products.php" title="Products">Products</option>
                <option value="services.php" title="Services">Services</option>
</select>
<input type="submit" name="submit" value="Go">
</form>
 
 
2.js
function createObject() {
        var request_type;
        var browser = navigator.appName;
        if(browser == "Microsoft Internet Explorer"){
                request_type = new ActiveXObject("Microsoft.XMLHTTP");
        } else{
                request_type = new XMLHttpRequest();
        }
        return request_type;
}
var http = createObject();
 
function redirect_page(){
        alert("hi")
        http.open('get', document.getElementById('menu').options[document.getElementById('menu').selectedIndex].value, true); // here is the problem
        http.onreadystatechange = function(){
                if(http.readyState == 4){
                        var response = http.responseText;
                        //alert(response)
                        document.getElementById('login_response1').innerHTML = response;
                        document.getElementById('login_response2').innerHTML = text;
                        }
                }
        http.send(null);
}

                                              
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by: designersxPosted on 2009-07-03 at 22:50:01ID: 24775973

we don't need to call the function in php page instead we should call the function in js file as we are doing.

but there is no response from the ajax side. i also took the div named abc.

2.php
<script type="text/javascript" language="javascript" src="2.js"></script>
<form method="post" onsubmit="return redirect_page()">
<select id="menu" name="menu">
       <option value="" selected="selected">Select</option>
        <option value="new.php" title="create new">create new</option>
                <option value="products.php" title="Products">Products</option>
                <option value="services.php" title="Services">Services</option>
</select>
<input type="submit" name="submit" value="Go">
</form>
<div id="abc"></div>
 
2.js
function createObject() {
        var request_type;
        var browser = navigator.appName;
        if(browser == "Microsoft Internet Explorer"){
                request_type = new ActiveXObject("Microsoft.XMLHTTP");
        } else{
                request_type = new XMLHttpRequest();
        }
        return request_type;
}
var http = createObject();
 
function redirect_page(){
        alert("hi")
        http.open('get', document.getElementById('menu').options[document.getElementById('menu').selectedIndex].value, true); // here is the problem
        http.onreadystatechange = function(){
                if(http.readyState == 4){
                        var response = http.responseText;
                        alert(response)// here no response is coming.
                        document.getElementById('abc').innerHTML = response;
                        }
                }
        http.send(null);
}

                                              
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by: designersxPosted on 2009-07-03 at 22:52:23ID: 24775980

basically i think the respective page is not called. this is the problem

 

by: designersxPosted on 2009-07-03 at 22:55:03ID: 24775984

we can do something like sending the names of the page in the function as argument and then proceed.

 

by: designersxPosted on 2009-07-03 at 23:01:50ID: 24775999

take this final code, i think this is what we should do but the pages gets posted and page is not called. please look at it , i will be very thankful to you.

taken the div named abc

prod should get returned from products.php page and serv form services.php page

2.php
<script type="text/javascript" language="javascript" src="2.js"></script>
<form method="post" onsubmit="return redirect_page()">
<select id="menu" name="menu">
       <option value="" selected="selected">Select</option>
        <option value="new.php" title="create new">create new</option>
                <option value="products.php" title="Products">Products</option>
                <option value="services.php" title="Services">Services</option>
</select>
<input type="submit" name="submit" value="Go">
</form> 
<div id="abc"></div>
 
2.js
function createObject() {
        var request_type;
        var browser = navigator.appName;
        if(browser == "Microsoft Internet Explorer"){
                request_type = new ActiveXObject("Microsoft.XMLHTTP");
        } else{
                request_type = new XMLHttpRequest();
        }
        return request_type;
}
var http = createObject();
 
function redirect_page(){
        //alert("hi")
		var SelectedMenu = document.getElementById('menu');     
		var page = SelectedMenu.options[SelectedMenu.selectedIndex].value; //this contains the name of the page
		var text = SelectedMenu.options[SelectedMenu.selectedIndex].text;  //this contains the name of the text 		 
        http.open('get',page, true); // here we are calling the respective page
        http.onreadystatechange = function(){
                if(http.readyState == 4){
                        var response = http.responseText;
                        //alert(response)// here no response is coming.
                        document.getElementById('abc').innerHTML = response;
                        }
                }
        http.send(null);
}
products.php
<?php
echo "prod"; // this 
?>
 
services.php
<?php
echo "serv";
?>

                                              
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by: designersxPosted on 2009-07-03 at 23:03:50ID: 24776003

alert(page) //returns the page name
alert(text) // returns the text name

both are working fine.

 

by: OpalelementPosted on 2009-07-03 at 23:06:37ID: 24776010

The line I gave you wasn't for the PHP it was the JS... Perhaps I don't understand what you want. You mean that when you submit that form after selecting Products, it fills in div "abc" with the contents of products.php?

What I gave you gets which item is selected so it knows what page to ask AJAX to get. Is there another problem?

 

by: designersxPosted on 2009-07-03 at 23:06:42ID: 24776011

as u can see the below snapshot this is for alert(response) so that means we are being reached to the products.php page or ant other page. http.open is not working man

 

by: OpalelementPosted on 2009-07-03 at 23:10:14ID: 24776016

Oh, so the problem is that it isn't getting the text?

 

by: OpalelementPosted on 2009-07-03 at 23:15:02ID: 24776033

Works for me when I do this:
<form method="post" onsubmit="redirect_page();return false;">

Instead of this:
<form method="post" onsubmit="return redirect_page()">

You are trying to return the value of redirect_page, when all you really want to do is run the function. Also return false; stops the page from refreshing after you submit. When it refreshes it just wipes out any content that could have been written anyway.

 

by: designersxPosted on 2009-07-03 at 23:15:13ID: 24776034

>>The line I gave you wasn't for the PHP it was the JS
that i understand and sir i have tried ur code as u have given above.

>>You mean that when you submit that form after selecting Products, it fills in div "abc" with the contents of products.php?
this is the main problem sir contents of products.php page are not being filled to the div abc. this is what i want to resolve.  

>>What I gave you gets which item is selected so it knows what page to ask AJAX to get. Is there another problem?
sir ajax is not calling the respective page , in my above post i have given the snapshot showing that there is no response coming from the products.php page. because the ajax is not calling the respective page. this is the problem

respected sir ,  the code which i am using has been posted by me in above posts,please have a look at that. by my opinion it should be right but don't know why the problem is coming??

thanks




 

by: designersxPosted on 2009-07-03 at 23:19:53ID: 24776042

>>Works for me when I do this:

it is working yes , i am not using return false if u see my above code. this is done sir , please focus on the issue of inability of javascript page to call the php page that is products.php. 2.php page returns the page, that is right, i alerted

alert(page)/ it shows me the right page name
alert(response) // here is the problem sir.

 

by: designersxPosted on 2009-07-03 at 23:21:33ID: 24776047

>>Oh, so the problem is that it isn't getting the text?

alert(page) // working gives me the correct page name
alert(text)  // working gives me the correct text name

alert(response) // this is not working

 

by: OpalelementPosted on 2009-07-03 at 23:26:25ID: 24776057

You have to use return false; to prevent it from trying to leave the page. When it is trying to leave the page it won't give you the contents. Why can't you use return false; on it?

Another choice would be to replace the submit button with this:

<input type="button" onclick="redirect_page()" name="submit" value="Go">

 

by: designersxPosted on 2009-07-03 at 23:28:06ID: 24776059

see the 8th line.

function redirect_page(){
        //alert("hi")
		var SelectedMenu = document.getElementById('menu');     
		var page = SelectedMenu.options[SelectedMenu.selectedIndex].value; //this contains the name of the page
		var text = SelectedMenu.options[SelectedMenu.selectedIndex].text;  //this contains the name of the text 		
		alert(page)
		alert(text)
        http.open('get',page, true); // here we are calling the respective page
        http.onreadystatechange = function(){
                if(http.readyState == 4){
                        var response = http.responseText;
                        alert(response)// here no response is coming.
                        document.getElementById('abc').innerHTML = response;
                        }
                }
        http.send(null);
}

                                              
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by: designersxPosted on 2009-07-03 at 23:28:54ID: 24776063

ok let me check

 

by: designersxPosted on 2009-07-03 at 23:31:49ID: 24776067

yes i did with input type = button then it worked , with input type = submit did not worked for me  i used return false.

thanks

 

by: designersxPosted on 2009-07-03 at 23:38:11ID: 24776082

tell e 1 thing is it right ??
<form method="post" onsubmit="return redirect_page();return false;">

 

by: OpalelementPosted on 2009-07-03 at 23:43:27ID: 24776089

No, you don't want it to say "return" before the redirect_page since it is only an execution function and not a return function.

Correct way:
<form method="post" onsubmit="redirect_page();return false;">

 

by: designersxPosted on 2009-07-03 at 23:46:34ID: 24776091

all things r going good, just tell me 1 thing .

1) can we make products as an anchor tag that will be returned from the php page to the js file and show it in another div.

 

by: OpalelementPosted on 2009-07-03 at 23:50:38ID: 24776097

Yes, just create another function to handle the products and make the links run the function. (this code is untested but should work)

For example, make products.php have this source:

<a href="javascript:show_product('item1.php')">item 1</a>
<a href="javascript:show_product('item2.php')">item 2</a>

Then add this to the JS file:

function show_product(file){
        //alert("hi")
        http.open('get',file, true); // here we are calling the respective page
        http.onreadystatechange = function(){
                if(http.readyState == 4){
                        var response = http.responseText;
                        alert(response)// here no response is coming.
                        document.getElementById('product').innerHTML = response;
                        }
                }
        http.send(null);
}

 

by: designersxPosted on 2009-07-03 at 23:52:41ID: 24776101

Opalelement: thanks , u r really a gem , helping me a lot. could u please please notice my above question.
it is very simple but i am not getting how i should do it.

i want to do similar  to the below code so that i could be able to provide link to my users.

<a href="page name">text name</a>

 

by: designersxPosted on 2009-07-03 at 23:54:08ID: 24776105

yes i got you man, thanks a lot.

 

by: designersxPosted on 2009-07-04 at 05:22:15ID: 31599717

good

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