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JavaScript - Arrow Key Event
I want to use an onkeydown() on my web site and the web site to know which key I pressed. Specifically know I pressed the arrow keys and store which key was pressed in a variable.
any help? must work on all browsers. Similar TutorialsI've seen websites that have things like feedback and an arrow facing up that either take you to the top of the page or opens a form to give your feedback.
Hi forum, I am trying to attach an event to a dynamically produced button, and then use stopPropagation and preventDefault. Code: function chapter12_nodeOne() {
//create an element
var element = document.createElement('input');
//set some attributes
element.setAttribute('type', 'button');
element.setAttribute('value', 'submit');
element.setAttribute('id', 'myBtn');
//appendd the element into a DIV
document.getElementById('myDiv').appendChild(element);
//uses EventUtil to attach an event listener
EventUtil.addHandler(element, 'click', function() {
alert('event attached');
});
var flag = confirm('prevent default behavior of button?');
if (flag) {
var el = document.getElementById('myBtn');/////////////////////////(1)
var ev = el.onclick;
}
}
var EventUtil = {
addHandler: function(element, type, handler) {
//check if the element and the browser support DOM Level 2 event attachment
//if the user is not browsing with IE
if (element.addEventListener) {
element.addEventListener(type, handler, false);
}
//if user is browsing with IE
else if (element.attachEvent) {
element.attachEvent("on" + type, handler);
}
//if user is using a browser that only supports DOM Level 0 event attachment
else {
element["on" + type] = handler;
}
},
removeHandler: function(element, type, handler) {
//check if the element and the browser support DOM Level 2 event attachment
//if the user is not browsing with IE
if (element.removeEventListener) {
element.removeEventListener(type, handler, false);
}
//if user is browsing with IE
else if (element.detachEvent) {
element.detachEvent("on" + type, handler);
}
//if user is using a browser that only supports DOM Level 0 event attachment
else {
element["on" + type] = null;
}
}
};
But when debugging I see under el on the line marked with (1) that the onclick event is null. What am I doing wrong?! PS:the event is attached, when I click on the button I get an alert message Hey! I searched a while on the web for this but i didn't find a solution that really worked. So is there a way how i can prevent IE9 from scrolling when i use the arrow keys? Disable Arrow Keys I am creating an online flash gaming site, Aaron's Game Zone: http://azzaboi.weebly.com Some of the games on it use the arrow keys, however IE also uses them to scroll the page. I am learning JavaScript and am trying to write some script to pervent the page scrolling up and down while playing a game. For example... Guardian Rock uses the arrow keys to slide around, at the same time the page scrolls. http://azzaboi.weebly.com/guardianrock.html Here is the script I've tried to write to pervent the scrolling: Code: <script type="text/javascript">
function KeyPressHappened(e){
if (!e) e=window.event;
var key=e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0;
if(key == 37 || key == 38 || key == 39 || key == 40)
{
e.preventDefault();
return false;
}
return true;
}
document.onkeypress = KeyPressHappened;
</script>
There's a bug in it or it's not correct, no error message given, could anyone point out the mistake please? hi everybody; i'm using this code to trigger functions with left and right arrow keys.. but they work even if the arrow keys pressed in input boxes.. is there any way to prevent this code to work when user presses the arrow keys in input boxes? Code: document.onkeydown = function(evt) {
evt = evt || window.event;
switch (evt.keyCode) {
case 37:
geri();
gostergeyaz();
break;
case 39:
ileri();
gostergeyaz();
break;
}
};
is it possible to capture the control.event or element.event that was fired to invoke the onbeforeunload event. for example, if a button is clicked and it causes the onbeforeunload event to fire can i determine which button was clicked. thanks Hello. I want to move something with the arrow keys, but some aprt of script is incorrect and it's not working Code: </style>
<script type="text/javascript">
function setup() {
row=0;
col=0;
imageSnake(row,col);
}
</script>
</head>
<body onload="setup()" onkeydown="handleKey(event)">
<center>
<script type="text/JavaScript">
document.write('<table border="1" cellspacing="0" cellpadding="10">')
var count =0
for (var row=0; row<20; row++) {
document.write('<tr>');
for (var col=0; col<20; col++) {
document.write('<td style="border:0"; id="count++";>');
document.write('</td>');
}
document.write('</tr>');
}
function handleKey(e) {
if (e.type == 'keydown' && (e.keyCode == 27 || (e.keyCode >= 37 && e.keyCode <= 40))) {
switch(e.keyCode) {
case 37:
dC = -1;
dR = 0;
break;
}
emptyCell(row,col);
function emptyCell
var id = 'r' + r + 'c' + c;
var cell = document.getElementById(id);
if (cell) cell.innerHTML='';
}
row += dR
col += dC
function insertImage(r,c) {
var id = 'r' + r + 'c' + c;
var cell = document.getElementById(id);
var color = cell.className;
if (color != 'white') {
var image = 'img.gif';
}else{
var image = 'img2.gif';
}
cell.innerHTML = '<img src="" + image + alt="" + color + 'image' />';
}
</script>
Thank you for any noticed error. Hi All, I have a javascript scrollbar in the middle of the webpage, with two images as arrow at both end. Onclick of up and down arrow images the inside content moves up and down respectively. All works fine. What I need is, when I scroll down the down arrow should be disabled or invisible (as there is nothing to scrolldown) and same way when the content is at the top, the up arrow should be disabled or invisible. Please help... Sharing the code : <body> <script src="http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/dw_event.js" type="text/javascript"></script> <script src="http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/dw_scroll.js" type="text/javascript"></script> <script src="http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/scroll_controls.js" type="text/javascript"></script> <script type="text/javascript"> function init_dw_Scroll() { var wndo = new dw_scrollObj('wn1', 'lyr1'); wndo.setUpScrollControls('scroll_links'); wndo.setUpScrollControls('wn1'); var wndo2 = new dw_scrollObj('wn2', 'lyr2'); var wndo3 = new dw_scrollObj('wn3', 'lyr3'); wndo3.setUpScrollbar("dragBar", "track", "v", 1, 1); wndo3.setUpScrollControls('scrollbar'); wndo3.setUpScrollControls('extra_controls'); wndo3.setUpScrollControls('wn3'); } if ( dw_scrollObj.isSupported() ) { dw_writeStyleSheet('http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/vert.css'); dw_Event.add( window, 'load', init_dw_Scroll); } </script> <link rel="stylesheet" href="http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/vert.css" media="screen"> <h2>Demonstration</h2> <div class="holder1"> <div class="hasImage scroll_controls" id="scroll_links"> <a class="mouseover_up up" href=""><img src="http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/tri-up.gif" alt="" width="12" height="12"></a> <a class="mouseover_down dn" href=""><img src="http://milansolutions.com/file_depot/0-10000000/20000-30000/29948/folder/92044/tri-dn.gif" alt="" width="12" height="12"></a> </div> <div id="wn1"> <div style="left: 0px; top: 0px; visibility: visible;" id="lyr1"> <h3>Mouseover Scrolling </h3> <p>This example demonstrates vertical scrolling using mouseover links. Scroll speed is adjustable.</p> <p>Mouse down on the arrows to see the speed double. Original speed resumes on mouseup.</p> <p>The documentation provides information for setup. The download file contains examples in individual files for your convenience and ease of implementation.</p> <p>The code supports the capability to hide or swap images when the end is reached. Further information is provided upon request to licensed users of the code.</p> <p>Content repeated for your scrolling pleasure </p> <p>This example demonstrates vertical scrolling using mouseover links. Scroll speed is adjustable.</p> <p>Mouse down on the arrows to see the speed double. Original speed resumes on mouseup.</p> <p>The documentation provides information for setup. The download file contains examples in individual files for your convenience and ease of implementation.</p> <p>The code supports the capability to hide or swap images when the end is reached. Further information is provided upon request to licensed users of the code.</p> <p>Back to the <a href="#" class="click_up_to_0_0">top</a></p> </div> </div> </div> I have a search box on my website, that gets users from my database using php. And uses Javascript to display suggestions as the users type. What I'd like to be able to is to use the arrows to toggle down through the different suggestions. Any ideas how I would go about doing this? Here's the javascript part of the code: Code: 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();
/* -------------------------- */
/* SEARCH */
/* -------------------------- */
function autosuggest() {
q = document.getElementById('search-q').value;
// Set te random number to add to URL request
nocache = Math.random();
http.open('get', 'lib/search.php?q='+q+'&nocache = '+nocache);
http.onreadystatechange = autosuggestReply;
http.send(null);
}
function autosuggestReply() {
if(http.readyState == 4){
var response = http.responseText;
e = document.getElementById('results');
if(response!=""){
e.innerHTML=response;
e.style.display="block";
} else {
e.style.display="none";
}
}
}
On http://kisa.ca/cc/ I'm using JQuery's .keydown() to grab arrow keys. http://pastie.org/938572 But my friends using Linux are unable to use arrows to play the game: http://alteeve.com/files/cc.png Halp? I am trying to assign the left and right arrows, but I cannot get the code to work. It would be great to get some help--I am a newbie to coding. <html> <head> <script language="javascript" type="text/javascript"> document.onkeydown=function(e) { var thelink if (e.keyCode==37) thelink='prevlink' else if (e.keyCode==39) thelink='nextlink' else return document.location.href=document.getElementById(thelink).href} </script> </head> <body> <a href="#" onkeydown="return previous(this)" id="prevlink">PREVIOUS</a><br /> <br /> <a href="#" onkeydown="return next(this)" id="nextlink">NEXT</a> </body> </html> I have three buttons on a typical page (sample page: http://jimoberst.com/paintings/p18.html). One goes to the previous page, one to the next, and one up a level. Can I link these buttons to 3 arrow keys to simplify navigation for the user? I thought this would be a common task, but I cannot find any canned code on the web to do it. I can code simple html, but don't know javascript. Thanks!
I have a ondrag event handler and in that I am trying to retrieve e.ClientX but it always return 0 in Mozilla. Works fine in IE though. How can retrieve the clientX and clientY in ondrag event? Hi I'm a newbie. Please help me. I'm using Joomla. I've got a dropdown which reads the filename from the database. When the user selects it I want an onchange event to open the pdf. I've been at it for 2 days now. Code: <?php
$con = mysql_connect('localhost', 'root', '');
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("metnet", $con);
$sql="SELECT * FROM newsletter";
$result = mysql_query($sql);
echo "<form method='post'>";
$dropdown = "<select name='sname' onChange='location(this.form.sname)' >";
while($row = mysql_fetch_assoc($result)) {
$dropdown .= "\r\n<option value='{$row['fpath']}'>{$row['fpath']}</option>";
}
$dropdown .= "\r\n</select>";
echo $dropdown;
?>
I have a asp:textbox where I'd like to capture when the user hits Enter, and then instead of doing whatever it normally would, then it should call a javascript function. I'm not sure how to do that, other than I suppose I should use the OnTextChanged event. But I'm not sure which parameters are sent with the event... Thanks in advance I can't seem to get the event listener to run an event when I focus on the text field with the ID username. JavaScript: Code: function listener_loginForm() {
var fields = Array("username","password");
for ( j = 0; j < fields.length; j++ ) {
var objs = document.getElementById(fields[j]);
for ( var i = 0; i < objs.length; ++i ) {
var elm = objs [ i ];
elm.onblur = function() { display_text_bg(this); };
if (elm.Id = "password") {
elm.onfocus = function() { switch_field(this); };
}
}
}
}
//This function attaches events to elements.
var addEvent = function( elm, evt, fun ) {
if ( elm.addEventListener ) {
elm.addEventListener( evt, fun, false );
} else if ( elm.attachEvent ) {
elm.attachEvent( 'on' + evt, fun );
} else {
elm [ 'on' + evt ] = fun;
}
};
addEvent ( window, "load", listener_loginForm );
//Put text in fields if there is not data, also switch text field to password field
//when focused on. Switch back to text field if no text is entered.
function display_text_bg(obj) {
alert("remove text");
}
function switch_field(obj) {
alert("switch");
}
HTML: Code: <form name="login" class="login">
<label for="username">Username: </label><br />
<input type="text" name="username" id="username" />
<br /><br />
<label for="password">Password: </label><br />
<input type="text" name="password" id="password" />
<br /><br />
<label for="remember">Remember Me? </label><br />
<br />
<span class="remember">
<span class="text">Never</span>
<input type="hidden" value="never" name="rememberme" />
<ul>
<li>Never</li>
<li>24 Hours</li>
<li>1 Week</li>
<li>Always</li>
</ul>
</span>
</form>
Dammit, for some reason this script has stopped working :/ When I click the links with the ID's of "login_dialog" and "register_dialog" a div should be shown... I'm using an event listener to do this. Code: function listener_items() {
//Text field background
addEvent(document.getElementById('input_username'), "click", add_username_password);
addEvent(document.getElementById('input_username'), "blur", remove_username_password);
addEvent(document.getElementById('input_password'), "click", add_username_password);
addEvent(document.getElementById('input_password'), "blur", remove_username_password);
//Switch between forms
addEvent(document.getElementById('dialog_login'), "click", login_dialog_login);
addEvent(document.getElementById('dialog_register'), "click", login_dialog_register);
addEvent(document.getElementById('dialog_recovery'), "click", login_dialog_recovery);
//Display Dialog
addEvent(document.getElementById('login_dialog'), "click", navbar_login);
addEvent(document.getElementById('register_dialog'), "click", navbar_register);
//Close Dialog
addEvent(document.getElementById('close_dialog'), "click", login_dialog_close);
}
//Login dialog, login form input fields background text
var add_username_password = function() { add_input_text(this); };
var remove_username_password = function() { remove_input_text(this); };
//Login dialog buttons
var login_dialog_login = function() { display_form('login'); };
var login_dialog_register = function() { display_form('register'); };
var login_dialog_recovery = function() { display_form('recovery'); };
//Close dialog
var login_dialog_close = function() { display_dialog('login', 'hidden'); };
//Navigation bar buttons
var navbar_login = function() { display_dialog('login', 'visible'); };
var navbar_register = function() { display_dialog('register', 'visible'); };
//This function attaches events to elements.
var addEvent = function( elm, evt, fun ) {
if ( elm.addEventListener ) {
elm.addEventListener( evt, fun, false );
} else if ( elm.attachEvent ) {
elm.attachEvent( 'on' + evt, fun );
} else {
elm [ 'on' + evt ] = fun;
}
};
addEvent ( window, "load", listener_items );
//Display/Hide login dialog
function display_dialog(dialog, fun) {
//Define the active menu item style
var active_style = "border-right-width:3px; width:113px; border-right-color:#33CCFF; color:#FFFFFF;";
//Creat array with all forms
var formsHide = Array("login","register","recovery"); var i = 0;
document.getElementById('wrapper').setAttribute('style', 'visibility:' + fun);
for ( i = 0; i < formsHide.length; i++ ) {
if ( formsHide[i] == dialog && fun == 'visible' );
document.getElementById("dialog_" + dialog).setAttribute('style', active_style);
document.getElementById(formsHide[i] + "_form").setAttribute('style', 'visibility:visible');
formsHide.splice(i, 1);
}
document.getElementById(formsHide[i] + "_form").setAttribute('style', 'visibility:hidden');
}
}
//Put text in fields if there is not data, also switch text field to password field
//when focused on. Switch back to text field if no text is entered.
function add_input_text(obj) {
var id = obj.id.split("input_");
document.getElementById(id[1]).innerHTML = '';
}
function remove_input_text(obj) {
if (obj.value.length == 0) {
var id = obj.id.split("input_");
var id2 = id[1].substr(0, 1).toUpperCase() + id[1].substr(1);
document.getElementById(id[1]).innerHTML = id2;
}
}
function display_form(form) {
//Define the active menu item style
var active_style = "border-right-width:3px; width:113px; border-right-color:#33CCFF; color:#FFFFFF;";
var forms = Array("login", "register", "recovery");
for ( c = 0; c < forms.length; c++ ) {
if ( forms[c] == form ) {
document.getElementById( forms[c] + "_form" ).style.visibility = "visible";
document.getElementById("dialog_" + forms[c]).setAttribute('style', active_style);
document.getElementById("dialog_" + forms[c]).setAttribute('class', 'overlay_table' + ' ' + forms[c] + ' active');
forms.splice(c, 1);
}
}
for ( c = 0; c < forms.length; c++ ) {
document.getElementById("dialog_" + forms[c]).setAttribute('style', '')
document.getElementById( forms[c] + "_form" ).style.visibility = "hidden";
document.getElementById("dialog_" + forms[c]).setAttribute('class', 'overlay_table' + ' ' + forms[c]);
}
}
HTML: Code: <span><a href="#" id="login_dialog" style="color:#33CCFF;">Login</a></span> <span><a href="#" id="register_dialog" >Register</a></span> I am looking to add a calendar to my website in order to list events for each day on the calendar you click on. For example, the link below shows a calendar on the left, that when you click on a day it lists all the events that day. I have done a few searches, but am not sure if I can find a calendar that acts like this... Calendar Example Any help would be greatly appreciated! Please can someone explain to me in simple terms which this actually does. From what I understand it will check all events until a defined event happens, such as rollover of a certain image, and then it activates a function? What I want to do is use this so that when I rollover a element such as below: Code: <img src="img url" alt="this is a tooltip" tooltip="true" /> I want it to pass the obj to a function which then runs, and then once the mouse of not over that element it will activate another function passing the previous object to this function. Although an element such as the example below would not activate these functions: Code: <img src="img url" alt="this is a tooltip"/> As the tooltip tag does not exist or has the value of false... Also, wouldn't this use a lot of resources as it checks every event which the mouse passes over? |
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