I have a music project in Perl which also requires some JavaScript but I seem to be stuck.
I need to execute a program (ffplay) as a command-line application so it runs without displaying a GUI window. The Perl handles the server end of things (sqlite database access). I need JavaScript because I display track names as a button, which when clicked is supposed to run 'ffplay' to play the track named in the button code. But the button click requires JavaScript.
When I click a track name button, it only displays the first track, no matter which one I
click.
The following code extracts track names from the DB.
$sth=$dbh->prepare (qq{select track from tracks where
artistid=$ArtistID and cdid=$cdID order by track});
$sth->execute();
while(#records=$sth->fetchrow_array()) {
$Track=$records[0];
print<<EndHTML;
<script>
var form=window.document.forms[0]
function process(form) {
alert ("Track: " + form.elements.Track.value)
}
</script>
EndHTML
print qq{<form name="Player">};
print qq{<input type="button" onClick="process(this.form)" name="Track" value="$Track"><br/>};
print qq{</form>};
}
$sth->finish();
SOLVED.
Changed the JavaScript function :
<html lang="en">
<head>
<script>
function process(value) {
var form =document.Player
alert ("Track: " + value)
}
</script>
</head>
<body>
<form name="Player">
<button onClick="process(this.value)" name="Track1" value="[01] Evenfall.flac">[01] Evenfall.flac</button><br/>
<button onClick="process(this.value)" name="Track2" value="[02] 6am.flac">[02] 6am.flac</button><br/>
<button onClick="process(this.value)" name="Track3" value="[03] Cut.flac">[03] Cut.flac</button><br/>
</form>
</body>
Now the alert correctly tells me which button was clicked.
Related
I'm very new to coding, so please forgive me if this is a dumb question.
I'm working on an assignment where I have to add functionality and styles to an existing bootstrap HTML doc. The purpose is to allow people to enter a dollar amount into an input field either by typing in an amount or by clicking buttons that populate the field with set amounts. One of my instructions was to update the donate submit button so that it appends the chosen donation amount to the "/thank-you" URL.
This is what I have for the input field:
<form id="amountSend">
<input type="text" class="form-control donation-amount-input" placeholder="Other" id="other-amount"/>
</form>
This is what I have for the button:
<button id="donateBtn" type="submit" action="/thank-you"
method="get">DONATE<span class="metric-amount"></span></button>
And I was thinking that the jQuery would look something like this, though the submit function is not currently giving me any visible results.
$("#donateBtn").click(function() {
if (!$.isNumeric($("#other-amount").val())) {
$("#dataWarning").show();
$(".metric-amount").hide();
$(".metric-message").hide();
} else {
$("#amountSend").submit(function() {
var url = "/thank-you";
$(".metric-amount").appendTo("url");
});
}
})
I also got some decent results using a PHP method:
<form id="amountSend" method="post" action="/thank-you.php">
<input type="text" class="form-control donation-amount-input" placeholder="Other" id="other-amount" name="donation"></input>
</form>
<button id="donateBtn" type="submit">DONATE<span class="metric-amount"></span></button>
<script>
$("#donateBtn").click(function() {
if (!$.isNumeric($("#other-amount").val())) {
$("#dataWarning").show();
$(".metric-amount").hide();
$(".metric-message").hide();
} else {
$("#amountSend").submit();
}
});
</script>
This one will open the PHP file I set up (/thank-you.php, which i have stored just in the same root folder as my main HTML doc), but all the browser gives me is the raw HTML code of the PHP file. Here's the code I have in the PHP file:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>
<body>
Thank you for your donation of
<?php echo $_POST["donation"]; ?><br>
</body>
</html>
Anyway, I guess I'm wondering if I'm on the right track? Should I pursue the jQuery or PHP method? Can I even do this using only jQuery? I've seen a few posts on this subject already, but I thought I'd make a new one since the ones I've seen are all fairly vague, I haven't seen the same answer twice, and I'm not sure I fully understand exactly what I'm trying to accomplish, in terms of a visual confirmation of results.
Thanks!
First of all, you have several issues with your code.
Number one: The formulary you have there is bad coded, the form tag needs to have the action and method attributes, not the submit button.
And in top of that, the submit button needs to be inside the form tag, if is not in there, it will not have and kind of effect.
Number two: If you are gonna submit the formulary to a php file and handle the request there ,you need the file to be running on a server (local or whatever). PHP is a server language, if you open the file directly in a browser, it will show you the code it has inside and will not work.
Hope it helps!
Friends recently i was writing code on jsp where i have to use a button to call a class and use its method.However when i tried same i received unexpected output.I tried search the reason and came across various related questions but i am still struck as i don want use EL or jstl.so basically when i am calling a javascript function on button click it is working but as soon as i put some java code lets say response.sendRedirect("/abc.jsp") the page is getting redirected even before i click button.Please help as i am really struck and not able to get solution.Below is working fine.But when I add any Java code.It is performed without click event.
</head>
<body>
<button id="doUnzip" type="submit" name="unzip">Unzip</button>
<script>
document.getElementById('doUnzip').onclick=function (){
alert("welocome");
};
</script>
</body>
Now the below is not working
<body>
<button id="doUnzip" type="submit" name="unzip">Unzip</button>
<script>
document.getElementById('doUnzip').onclick=function (){
<%
response.sendRedirect("/index.jsp");
%>
};
</script>
</body>
Working through a problem, I have managed to identify and write an SQL injection, send that injection to a site but I need to automate clicking the login button.
Is it possible (through JavaScript, html, etc) to load a webpage fill in a bunch of data fields and click a button?
I'm trying to automate something and I can do everything but click the button on the webpage.
The process is:
Get user data on your webpage (he will click a button to finish)
Send that data to a different webpage
Fill data fields on second webpage
Click a submit button on the second webpage
I am stuck on the last part.
Here is the code I have so far
<!DOCTYPE html>
<html>
<head>
<script>
function func()
{
var str1 = document.getElementById("name").value;
var str2 = "SQL ADDED EXPLOIT STRING";
document.getElementById("name").value = str1.concat(str2);
return true;
}
</script>
</head>
<body>
<form action="website.com" method="POST">
<input name="login" id="name" value="username" />
<button id="button" onclick="func()">press button</button>
</form>
</body>
</html>
I am trying to get the value of a range slider after it moves and then update my page. I have approached this by using "onchange" and calling some javascript to set a value to a text box and using php to get that value. The php does not even grab the value from the text area on load and I am not sure why. It says the id of the input text box is an "unidentified index." There might be a simple thing wrong or I may be approaching it completely wrong. I am new to this...
Here is the code for the slider.
<!doctype html>
<html lang="en">
<head>
<script type="text/javascript" src="//code.jquery.com/jquery-1.9.1.js"></script>
<script>
function printValue(sliderID, textbox) {
var x = document.getElementById(textbox);
var y = document.getElementById(sliderID);
x.value = y.value;
}
window.onload = function() { printValue('slider1', 'rangeValue1')};
</script>
</head>
<body>
<form action='slider.php' method='get'>
<input id="slider1" type="range" min="100" max="500" step="10" onchange="printValue('slider1','rangeValue1')">
<input id="rangeValue1" type="text" size="2">
</form>
<?php
echo $_GET['#rangeValue1'];
?>
</body>
</html>
The js function does set input text box, but the php script doesn't happen. I need to get the value in PHP because the page I'm including it in is written in PHP. I don't know if, or how, the page has to be reloaded. I tried using location.reload() in the onchange function and it just continuously loaded the page.. Please help! Any input will be helpful! Thanks!
It looks like you might be getting Javascript and PHP mixed up.
PHP is run solely on your server when a browser accesses a php file. The output of the php file (like when you use echo) is sent as a webpage. However, Javascript is run solely in the browser. To make them communicate, you will need to load another webpage (or reload the current webpage). You can either use a form or directly craft the URL (probably easier in this case).
So you could do something like this inside printValue():
location.querystring="?value=" + x.value;
This will create a GET argument, which you can access with $_GET['value'], and reload the page.
EDIT: Performance Warning!
Every time the slider is moved, your server will end up resending the webpage, which could slow down the server. You might want to only send the new value after the user has clicked a button or something, in which case it would be easier to use a form.
I am trying to use buttons in an html/javascript program to redirect someone to another one of my pages. Basically, I created a .jsp page that gives the user some buttons to click. If the user clicks a button, it calls a method that is supposed to open a new .jsp page that I created under the same project. However, I have no clue how to do this as I am brand new to Javascript and HTML. I provided an example below:
Sample Page
<html>
<title>Web Page</title>
<body>
<p>Please click a button to redirect you to the page you wish to go to.</p>
<br>
<form>
<input type="button" id="idname" value = "General Info " onclick="goToInfo()"/><br>
</form>
<br>
<form>
<input type="button" id="idname" value = "Other Information" onclick="goToOther()"/><br>
</form>
<script type="text/javascript">
function goToInfo(){
}
function goToOther(){
}
</script>
</body>
</html>
*For example, I have another page in my NetBeans project that is called "GeneralInfo.jsp" and I want goToInfo() to be able to redirect the person to that page. Thank you for your help.
You could use window.location to redirect the user to the corresponding JSP pages; however, you'll need to make sure your paths in the code below match the actual paths to your JSP page as mapped by your servlet or based on the absolute path relative to the application.
function goToInfo(){
window.location = '/GeneralInfo.jsp';
}
function goToOther(){
window.location = '/someOtherJSPPage.jsp';
}
If you get 404 errors when trying to redirect to your JSP page, try turning up your logging level to ALL or DEBUG so that you can see the logs from the framework or Java container, these will hopefully show you the real file paths so that you can then adjust the URL to match the actual target location.
this should open new tab with GeneralInfo.jsp when you click on the General Info button..
function goToInfo(){
window.location = "GeneralInfo.jsp";
}
you can use this method,
<input type="button" value="General Info" name="INfoPage"
onclick="document.forms[0].action = 'infoPage.jsp';" />
or the easy way is,
General Info