How To Call A PHP Script Using JAvaScript
Mar 18, 2006
First let me describe the problem. I have an HTML form that in one
field has an onBlur call to a JavaScript function. When you exit the
field, it calls the JavaScript routine, which in turn calls a PHP
script. The PHP script runs returns the value needed. And returns to
the JavaScript. The JavaScript function is then supposed to set
alerts depending on the values returned from the PHP script. It
doesn't. If you then move the cursor into the field and exit again,
it again runs the JavaScript which calls the PHP script then
proceeds to show the alerts exactly like it is supposed to.
I did some experimenting, and if you use a button to run the
JavaScript, the exact same thing happens. Click the button and the
PHP script sends back the value, but no alert. You click the button
a second time, and the alert shows.
I am using the JavaScript monitor in FireFox v1.5 so I can see that
the PHP script is being called and returning the correct value the
first time. So what I am trying to figure out is why the routine has
to be called twice before I get my alert.
Below is the HTML, JavaScript & PHP that I am using....
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Jul 23, 2005
I ve a aspx page with a textbox.I have created the Text_Changed event
for this textbox.We know that , this will be fired when we enter any
text in that textbox and pressing the enter key.quite natural.
I am putting some text in that text box thru javascript from the
window_onfocus event.
After that , i need that the text_changed(server event) event to be
fired,so that i could perform some search operation.
Could you please tell me how can i call the Text_changed server event
from the javascript.
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Jun 5, 2006
I am trying to call a java method from within my Javascript, but cannot
seem to get it to work. All the examples I have found online and in
the forums are using Java applets. I have a method that I want to call
that does a search, and produces a message dialog displaying the
results. Also, the class file lives next to the html file. How would
I invoke this in my code? This is what I have now:
<script>
function searchStrings(){
Searcher.search();
}
</script>
<form>
<input type="button" value="Search" onclick=searchStrings()>
</form>
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Apr 26, 2010
I have my events and syntax in the immediate script and they were working fine. But Im trying to move it all into the Script tags and call on them by using the function ID but cant seem to figure it out. here's what I got:
<html>
<body>
<script type="text/javascript">
function txtAmenity()
[code]...
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Mar 22, 2005
Does anyone know how you can test if an applet's method exists before you try and call it?
for example, if you don't have a JRE installed on your computer and try and access an applet method it shoots out a javascript error at you. I want to be able to test if the applet is operational basically before I try and use any of its methods.
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Jun 24, 2007
I have a script that is working well to detect if the client has acrobat reader is installed or not. I can print out next to the PDF link if the user has or hasn't got the reader. My problem is that i want to call that function and print something out only if the user clicks on the link to see the PDF file. This is where i'm at at the mo
echo "<br>Price: Euro ";
echo $price."<br />";
echo "<a href = "pdf/$pdf">";
?>
<script type="text/javascript" src="plugins.js">
</script>
<?php
echo "See Pdf</a></td>
";
?>
</tr>
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Jun 12, 2002
I have the following windows media player object integrated in a page. How to call a javascript action when the movie is finished?
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Feb 28, 2006
do you know if it's possible to call a python script in html page?? I want call my script pyhton and I have a html with javascript but I don't know how, do you have an example??
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Mar 17, 2006
Hi, I have this JavaScript, which I only want to occur if a user clicks on a
hyperlink hotspot in a large image:
<script type="text/javascript">
<!--
var answer = confirm ("This link is not available, click OK to load a
similar link, or Cancel to not.")
if (!answer)
window.location="http://www.yahoo.com/"
// -->
</script>
To make matters more challenging, there are about 10 hotspots in the image,
and I want them each to have a different value for window.location. I.e. if
the user clicks OK in each hotspot, each one will redirect them to a
different site.
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Jan 12, 2007
I have some javascript that works in Firefox 2 but not in IE 7. In the
parent page, a user clicks a link and a new window is opened so that
they can maintain some values. When the user is finished, they can
click either a save or a cancel button. If the user clicks the save
button, I want the parent page to be refreshed and then the child
window to close. I have this working perfectly in FF2 but it does not
in IE. In IE, the parent page is refreshed but when it refreshes, the
screen that comes back is the same screen as the child window. When
the child window should close, it instead is being refreshed and comes
back as a blank screen. Code:
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Sep 14, 2010
I've been using JavaScript for a few years now I'm not a huge expert I rely more of JQuery. I am just wondering what best solutions are there to call Javascript files (and to make pages load faster):
Normally I request all these in the Header like you normally would but I have seen and heard people to call their Javascript files in the footer to make page load faster and have all their Javascript functions all in the footer as well.
Is this a good idea? What are the downside? Should I just keep all my JS in the Header as usual?
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Jun 20, 2002
I have seen this employed somewhere else, but for the life of me cannot remember how it was done. I need to write a javascript that will call a desired CSS file based on the user's browser.
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Apr 5, 2006
The challenge is as above really. I have a page with an iframe in it, and need to call a JS function in the *parent* page, *from* inside the iframe.
(It's for Google Maps, but I won't bore you with the complexities of that, as it doesn't affect the question).....
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Jul 20, 2005
In fact, I want to suppress the right-click menu and use mine : It must like
same look and feel than the original context menu ...
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Apr 30, 2010
I need to make a $.post call on the beforeSend event of another $.ajax call.I read the documentation and I see that if the beforeSend return false the ajax call will be interrupt.So I made this code but doesn't work, because the real value of the beforesend function isn't true or false, is the value of the post.I have to do this because when you click on a link I need to verify before if you are able to do this via db permission of my webapp.I think you don't understand...This is the code:
$.ajax({
async: true,
beforeSend: function(){[code]....
});I see always the alert of success event, so the return of the beforesend is not correctly done.
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Dec 14, 2010
The general framework is a simple user login function. The user name is selected and a password entered as usual. The function grabs the element values and passes them to a php page that queries the database. An AJAX call returns the password to the function and then I want the innerHTML to be a choice of two web pages, depending on success or failure of validation. There are existing AJAX functions available on the internet but they are overly complicated for what I think should be a simple, quick to load function.
Where I am stuck is that the standard procedure to make an AJAX call is the browser window event. How do you make the call from within the function? I have tried creating two new variables, "success" and "again" to replace xmlhttp, but still stumble on the event to assign a value. I left the blank password protection (if statement) with that variable to demonstrate what I mean.
I've put in my code below, which is in development and successfully alters the innerHTML text depending on user input but I can't figure out how to insert the relevant php page. I have '// out' the testing bits, but left them for info. (I have tried full 'scripting' as the innerHTML, but it's messy.)
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Feb 11, 2006
<button onClick="return popup('<span onClick='selectShape(1, 1, 1)'>test<span>');" tabindex=Ɖ' onFocus="setFocusColor(0,3)">....</button>
This will work perfectly, but as soon as I need to pass Strings inside the selectShape function, I get stuck.
So the question is, how can I create the following and have it working
......selectShape(2, 'Tricky', ཤx5°').....
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Jan 27, 2011
I have several form in my site, that validate on onsubmit.I call all the validation functions from a file call functions.js.Here is a sample of the code that is working:
<form name="contact" action="contact-insert.php method="post" onSubmit="return checkform()">
<label class='SubHeadlbl' for='TextField1'><?php echo IDS_EFORMNAME?><br></label>
<input type='text' name='dfname' class='text_field' id='dfname1' size='70' maxlength='40'/>
</form>
all the other forms are not working. all have the same structure:
<form name="frm1000" action="frm1000-insert.php method="post" onSubmit="return checkform1000()">
<label class='SubHeadlbl' for='TextField1'><?php echo IDS_EFORMNAME?><br></label>
<input type='text' name='dfname' class='text_field' id='dfname1000' size='46' maxlength='40'/>
</form>
I don't know what is happening only one for work all the others don't.
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Jul 23, 2005
I'm working on some code and am running into brick walls. I'm trying
to write out Javascript with Javascript and I've read the clj Meta FAQ
and didn't see the answer, read many similar posts (with no luck
though), and searched through the IRT.ORG Faqs
(www.irt.org/script/script.htm).
The Javascript is designed to open an popup window and then inside that
window call another script which will resize that window. There may be
another way around this but the reason I tried this approach initially
was that I wanted to call the onload handler in the popup window to
resize the image only after the image had completely loaded. I've had
some code in the primary Javascript file (showimage.js) before that
works if the image has been cached but on the first load, it doesn't
resize properly which tells me it is probably because it is trying to
resize the window based on the image size but it isn't completely known
at that point. So I removed that code and tried placing the resizing
code in the second Javascript file (resizewindow.js). BTW I've tried
other code to open a popup image and automatically size it ie Q1443 at
irt.org but that doesn't do exactly what we need.
Even if there is another way to do this with one file, I still want to
figure out why this isn't working in case I run into it in the future.
I thought what I would need to do to use document.writeln to write
Javascript would be to escape any special characters and to break
apart the script tag ie
document.writeln('</SCRIPT>');
would become
document.writeln('</SCR' + 'IPT>');
I have a HTML page and 2 Javascript files. All files are in the same
directory and have permissions set correctly.
Here are the 3 files (keep in mind wordwrap has jacked up the
formatting):
index.html
----------
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Test</title>
<SCRIPT type="text/javascript" LANGUAGE="JavaScript1.1"
SRC="showimage.js">
</SCRIPT>
</head>
<body>
Click the house<BR>
<A ONCLICK="newWindow1('house1.jpg','Nice House')"><IMG
SRC="house1thumb.jpg"></A>
</body>
</html>
showimage.js
------------
function newWindow1(pic,sitename)
{
picWindow=window.open('','','width=25,height=25,sc rollbars=1,resizable=1');
picWindow.document.writeln('<html> <head>');
picWindow.document.writeln('<SCR' + 'IPT type="text/javascript"
LANGUAGE="JavaScript1.1" SRC="resizewindow.js"></SCR' + 'IPT>');
picWindow.document.writeln('</head>');
picWindow.document.writeln('<body onload="resizewindow();">');
picWindow.document.writeln('<img src=' + pic + '>');
picWindow.document.writeln('</body> </html>');
picWindow.document.close();
}
resizewindow.js
---------------
function resizewindow()
{
// Do resizing here.
// Right now this isn't being executed
alert("resizing window");
}
Can anyone provide some pointers as to why this javascript is failing?
I'm using IE6 on Win2k and when I click on the image to open the popup
window, it does open the window but it is white with no content and the
system immediately goes from about 4% CPU usage to 100% and
consistently stays there until I kill that window with the task
manager.
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Jul 23, 2005
Attached is a simple HTML file that adds and delete rows. In the add
row function I set an attribute "onClick" this triggers the
testMessage() function. When I try this in Firefox it works just fine
however on IE it just refuses to work.
What is interseting is the ROW that already exists has a similar
'onClick' event which works when the page is loaded, but subsequent
"row" additions to the table to not work in IE. Code:
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Feb 19, 2007
two possibilities or the attribute type of script:
text/javascript (the one i usually use) application/x-javascript
what are the differencies between both?
depends on the html content?
for example html 4.0.1 versus xhtml 1.1?
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May 25, 2005
I'm getting errors in Firefox everytime I try to run this frame resize code, but it works fine in IE. I can't seem to figure out what the problem is with it.
The error is: Error: theFrame has no properties
Line: 8
The line that the javascript console is showing an error for is in italics.
code from page:
<html>
<head>
<script type="text/javascript">
var defaultCols="100px,*";
var hiddenCols="0px,*";
function ShowHideMenu(){
theFrame = document.getElementById("framed");
if(theFrame.cols == defaultCols) theFrame.cols=hiddenCols;
else theFrame.cols=defaultCols;
}
</script>
<frameset cols="100px,*" name="framed">
<frame src="lframe.htm" name="frameMenu">
<frame src="mframe.htm" name="content">
</frameset>
</head>
<body>
</body></html>
Come someone let me know what I'm doing wrong here?
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Mar 30, 2006
I'm already past the basics of Javascript, and i need something that takes me to the other level and teaches me the new technologies and cool stuff (drag&drop, AJAX, OOP in javascript, maybe XUL...etc). So far i found these two books:
1. Sitepoint's "The JavaScript Anthology: 101 Essential Tips, Tricks & Hacks".
2. Worx's "Professional JavaScript for Web Developers (Wrox Professional Guides)"
Both seems to cover very insteresting topics, but i can only buy one of them. So which one do you suggest?
and by the way, i've read the sample chapter 5 of Sitepoint's book, and it seems like the author(s) just put the solutions/codes there and let you figure them out on your own. Is this how the rest of the chapters are?
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Jul 23, 2005
This is a question about defensive web browsing. Ocassionally I run into a page whose JavaScript does something that I find obnoxious. I would like to turn off JavaScript only for that page (instead of disabling it globally). It would be cool if there were some way to do this through a "bookmarkable" JavaScript snippet using the javascript: pseudoprotocol. Does anyone know any trick to do any of this?
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May 26, 2006
I am looking for a method to extract the links embedded within the
Javascript in a web page: an ActiveX component, or example code in
C++/Pascal/etc. I am looking for a general solution, not one tailored
to a particular page/script.
Hopefully, the problem can be solved without recreating a complete
Javascript interpreter. Any ideas?
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Oct 21, 2005
I have some javascript that I have written into the <body> section and it works great. But I would like to make it into a javascript function and define the function in the <head> section. Then in the <body> section write a small bit of javascript that would call the function() object. Code:
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