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Banned
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| 21Jul2009,12:01 | #11 |
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Ohh thats great, you have used ascii, but what about without using ascii, can we achieve it ?
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Newbie Member
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| 7Apr2010,04:44 | #12 |
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In order to detect the shift key, you can add a hidden input box and set its value to 1 whenever the shift key is pressed from within your js function. Then simply check the value of the hidden input box and disallow/allow as necessary (You will need two events to do this - keydown and keypress).
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Go4Expert Member
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| 7Apr2010,15:44 | #13 |
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This is an example for allowing only number in textbox I think this will help you
Code:
import java.awt.Container;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.PlainDocument;
public class ValidationTestFrame extends JFrame implements DocumentListener {
JLabel label = new JLabel("I only accept numbers");
private IntTextField intFiled;
public ValidationTestFrame() {
setTitle("ValidationTest");
setSize(300, 200);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container contentPane = getContentPane();
JPanel p = new JPanel();
intFiled = new IntTextField(12, 3);
p.add(intFiled);
intFiled.getDocument().addDocumentListener(this);
contentPane.add(p, "South");
contentPane.add(label, "Center");
}
public void insertUpdate(DocumentEvent e) {
setLabel();
}
public void removeUpdate(DocumentEvent e) {
setLabel();
}
public void changedUpdate(DocumentEvent e) {
}
public void setLabel() {
if (intFiled.isValid() ) {
int value = intFiled.getValue();
label.setText(Integer.toString(value));
}
}
public static void main(String[] args) {
JFrame frame = new ValidationTestFrame();
frame.show();
}
}
class IntTextField extends JTextField {
public IntTextField(int defval, int size) {
super("" + defval, size);
}
protected Document createDefaultModel() {
return new IntTextDocument();
}
public boolean isValid() {
try {
Integer.parseInt(getText());
return true;
} catch (NumberFormatException e) {
return false;
}
}
public int getValue() {
try {
return Integer.parseInt(getText());
} catch (NumberFormatException e) {
return 0;
}
}
class IntTextDocument extends PlainDocument {
public void insertString(int offs, String str, AttributeSet a)
throws BadLocationException {
if (str == null)
return;
String oldString = getText(0, getLength());
String newString = oldString.substring(0, offs) + str
+ oldString.substring(offs);
try {
Integer.parseInt(newString + "0");
super.insertString(offs, str, a);
} catch (NumberFormatException e) {
}
}
}
}
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Newbie Member
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| 22Jul2011,15:53 | #14 |
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use isNaN
for more detail with example visit urfusion.blogspot |
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Newbie Member
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| 4Oct2011,10:15 | #15 |
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hi,
i used the code above and find the following error, event is not defined how ever i used the following code and it worked fine, Code:
function onlyNumbers(evt)
{
/* if (!evt) {
evt = window.event;
} */
var e = window.event || evt; // for trans-browser compatibility
var charCode = e.which || e.keyCode;
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;
}
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Banned
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| 26Apr2012,02:52 | #16 |
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I am just starting java script, I'll use this code soon. thank you for sharing.
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Newbie Member
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| 28Apr2012,10:54 | #17 |
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Web development is beautiful field and in search engine optimization it is more important. Because there is main work on website.
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Go4Expert Member
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| 4May2012,07:31 | #18 |
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Is it possible to combine the characters as well as the numbers? What problem could fix your codes? Calculator? Digit Problem Solving? Anyway, this would add information to my HTML note. Thanks for the information.
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Contributor
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| 19Jan2013,11:19 | #19 |
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The HTML tag goes like this:
Code:
<form action="#.html" onsubmit=" return validate();" name="myform" method="post" style="border:thin;" >
<table align="center" bgcolor="#CCCCCC"; cellpadding="2px" style="text-align:left">
<tr>
<th>Contact No.</th><td><input type="text" id="cont" name="cont" /><font size="+0" color="#FF0000">*</font></td>
</tr>
</table>
</form>
Code:
function validate()
{
if( Uize.isNaN(document.getElementById("cont").value))
{
alert("Invalid Number.");
return false;
}
}
shabbir
like this
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