JavaScript - Detecting When Back Has Been Pressed (hear Me Out!)

I need a javascript that could record the ID/name of a textbox when the user hit delete or backspace to be used on the next page after submission in a PHP script.

There are 96 text boxes, they are all randomly placed on the screen with a question that came from a randomized array's keys (the script later checks the values of the textboxes with the values from the array's keys that correlate to the textboxes by the name/id of the textbox, which is assigned by a for loop that issues the next($array) to assign everything everywhere.

At the same time, it needs to count how many times the backspace/delete were pushed and have that recorded and sent as well.

After 45 minutes of research I've been able to solve the "count the backspace/delete key" problem:
Code:

<script type="text/javascript">
var count = 0;
document.onkeypress=function(e){
 var e=window.event || e
if (e.keyCode == 8) { //8 is backspace
 count++;
 document.getElementById('backspace').value=count; //this is a hidden input
 }
if (e.keyCode == 46) { //46 is delete
 count++
 document.getElementById('backspace').value=count; //the hidden input
 }
 }
 </script>

But onto the name/id issue:
I'm not sure how to go about retrieving the names/id of the textboxes. I would assume a onkeypress event for every textbox, but hope that there could be something I could just add to this code.

Thank you for your help.

Is there a way to stop a form submit after hitting submit? Refresh wouldn't realy be an option. Is abort() what I'm looking for?

how do i make a html button stay down when pressed, until another button within a specified group of buttons is pressed, at which point it is released and the other button stays pressed?

Hello all

I created a form which has a lot of textboxes, checkboxes and select-lists which are getting filled up by the records from a database table. I am basically creating an edit screen for a record.

No I want to check all these input elements using javascript validation. I want this to performed when a button "Archive" is pressed.

My problem is this "Archive button" needs to be a submit button. This does run the javascript validation but after completing the validation it submits the form. I want that submission should be stopped when the validation is violated. how can I do this?

What I want is a button which acts as a default button (triggers the onclick event when I press enter) but submits only if the form is valid.

Hi guys, would appreciate some help here.

The below is part of the codes of my image matching programme. The programme loads 2 different series of images in the area and the up/down button is supposed to change each set of the series of images. Currently, the codes only allow one set of the images to be changed. Any idea what can be done so that both set get changes when the up/down key is pressed?

Thanks!

Codes:

public void keyReleased(KeyEvent e) {
zoom = false;
repaint();
}

public void keyPressed(KeyEvent e) {
System.out.println("" + e.getKeyCode());
switch (e.getKeyCode()) {
case 16:
zoom = true;
zoomPt = getMousePosition();
repaint();
break;
case 39:
loadImage(true, true);
break;
case 40:
loadImage(false, true);
break;
case 38:
loadImage(false, false);
break;
case 37:
loadImage(true, false);
break;
}

}
public void changeDir(File dir) {
this.dir = dir;
}
public void loadImage(boolean isFileA, boolean increase) {
File[] fileList = dir.listFiles(new FilenameFilter() {

public boolean accept(File dir, String name) {
if (name.toLowerCase().endsWith(".dcm")
|| name.toLowerCase().endsWith(".dc3")
|| name.toLowerCase().endsWith(".dic")) {
return true;
} else {
return false;
}
}
});
if (fileList.length < 2) {
return;
}
try {
if (isFileA) {
a_os = increase? (a_os + 1) % fileList.length : (a_os - 1 + fileList.length) % fileList.length;
} else {
b_os = increase? (b_os + 1) % fileList.length: (b_os - 1 + fileList.length) % fileList.length;
}
String ext = fileList[a_os].getName().substring(fileList[a_os].getName().lastIndexOf(".") + 1);
Iterator readers = ImageIO.getImageReadersByFormatName(ext);
ImageReader reader = (ImageReader) readers.next();
reader.setInput(new FileImageInputStream(fileList[a_os]), true);
imgA = ((DICOMImageReader) reader).read(0, null);

ext = fileList[b_os].getName().substring(fileList[b_os].getName().lastIndexOf(".") + 1);
readers = ImageIO.getImageReadersByFormatName(ext);
reader = (ImageReader) readers.next();
reader.setInput(new FileImageInputStream(fileList[b_os]), true);
imgB = ((DICOMImageReader) reader).read(0, null);

w = Math.max(imgA.getWidth(), imgB.getWidth());
h = Math.max(imgA.getHeight(), imgB.getHeight());
} catch (Exception e) {
String fileName;
fileName = isFileA ? fileList[a_os].getPath() : fileList[b_os].getPath();
promptError(fileName + " could not be read");
e.printStackTrace();
System.exit(1);
}
dx = w / 2;
dy = h / 2;
}

public void promptError(String msg) {
JOptionPane.showMessageDialog(null, msg, "Error", JOptionPane.ERROR_MESSAGE);
}

public void keyTyped(KeyEvent e) {
}