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JavaScript - Does The In Operator Work On Function Properties?
I'm still learning js core using Flanagan's 5th ed.
so please bear with me; is the if ("ignore" in arguments.callee) return; below valid or a typeo? Thanks J. Code: function inspect(inspector, title) {
var expression, result;
// You can use a breakpoint to turn off subsequent breakpoints by
// creating a property named "ignore" on this function.
if ("ignore" in arguments.callee) return;
.......
Similar TutorialsanotherVar should be -1 if there are no matches, but it doesn't seem to work
PHP Code: var string = "abadafa"; var matches = string.match(/a/gi); //doesn't work with /z/ for example var anotherVar = matches.length || -1; The default operator should return the second value if the first is null or false, and according to PHP Code: try { alert(matches.length); } catch (e){ alert(e); //alerts null } it's null. fyi: http://helephant.com/2008/12/javascr...ault-operator/ What's going on? Hello I have a question which has been bugging me for a while now so have decided to ask it on CF. In PHP you can use the '&' symbol as a function operator for example like so. PHP Code: function demoFunc(&$output='') { for($i=1;$i<count(func_get_args());$i++) { $output .= ' '.func_get_arg($i); } $output = trim($output); } As you can see the '&' symbol was used in the argument section to allow the function to be used like this demoFunc($output,'hello','world'); print $output; My question is how can I do this in JavaScript to do the same thing like use the variable used in the function argument section and use it like it would be used in PHP? Thank you - DJCMBear Hey everyone, I'm a newbie writing a tic tac toe program using OOP. It was simple setting it up so that a player could click on a box to put an X or an O there, but I've run into serious issues when trying to make it so a player couldn't overwrite the AI's choice and the AI couldn't overwrite the player's. An example of this would be if I made the top right box an X and the AI then made the center box an O, and then I accidentally clicked the center box and made it into an X. I want to prevent that. Every box on the grid is an object with the property of "taken" that helps the program know if a box is empty or not, so as to avert any overwriting in the first place. If the box is empty, this.taken = 0. If the box is filled by a player, taken = 1. If filled by AI, taken = 2. I made it matter whether it was AI or human so later i can check if one of them got tic tac toe. Anyway, by default the constructor class sets this.taken = 0. But the method for checking availability and writing the X or O uses a switch which checks if taken = 0. If it is, it sets taken to either 1 or 2 and writes the necessary symbol. If taken = 1 or 2, it just alerts the player that the spot is taken. But for some reason the switch statement can't tell when taken = anything other than 0. It always executes the code for 0 even though the code for 0 inherently makes it so that taken never equals 0 again, which means case 0 cannot happen anymore. Below is the code with notes. Code: function main(input){//start of main function//
function Click(who, where, what){ //this is the method for checking if it's taken or not and writing the X or O if it isn't//
/*the argument who represents a number. 0 is no one, 1 is human, 2 is AI; where is a string literal
representing the spot on the grid*/
switch(this.taken){
case 0:
this.taken = who;
document.getElementById(where).innerHTML = what;
break;
case 1:
alert("this spot is taken");
break;
case 2:
alert("this spot is taken");
}//end switch
}//end Click
function Box(inputhere){//start of class//
this.taken = 0;
this.pick = Click;
}
//end of Box class//
//object declarations (I cut out most of them and left only the relevant ones//
var topleft = new Box();
var topmid = new Box();
var topright = new Box();
var centerright = new Box();
//end of object declarations//
switch (input){
/*in each .pick(), the first arg is whether or not a player chose it (1 = player did, 2 = comp did).
The second arg is which box and the third is whether to put an X or O. The input variable in the switch statement is an argument passed through main() when the
player clicks on a box. Topleft passes 1.1, topmid passes 1.2 and so on.*/
case 1.1:{
//The first instance of .pick() in each case is what the player did. The second is what the AI will do in repsonse.//
topleft.pick(1, "topleft", "X");
topmid.pick(2, "topmid", "<span>O</span>");
break;
}//end of case 1.1
case 1.3:{
topright.pick(1, "topright", "X");
centerright.pick(2, "centerright", "<span>O</span>");
break;
}//end of case 1.3
}//end of switch
}//end of main//
Is there anyone who has any idea why on earth this is happening? I've been at it for an embarrassing amount of hours. Also, thanks to anyone who even considers helping : ) (feel free to flame me if my code sucks or my post is too long or anything). Hi! I have encountered a problem with IE that I'm simply unable to solve. I have a form where the user can choose different things to input from a drop down list and depending on the choise, different kinds of textboxes of text areas etc. are loaded onto the page with JS. After the user has finished inputing text and submits the form, I read the input with PHP and process it further. Now, this works perfectly in firefox but IE doesn't seem to add the name properties to the elements (both textboxes and text areas) because PHP cannot find them and no info is printed from the input. The creation of the elements (adding them to the page...) works just fine, it's just getting the data from them that's the problem. Since it works in FF I know it's not a PHP problem. I've used the recommended .name to set the property (although I've also tried .setAttribute() etc), yet it still doesn't work. What can I do to solve this? My relevant JS code: Code: function addTextbox(idName, head)
{
var target = document.getElementById('addThings');
var newDiv = document.createElement("div");
newDiv.id = "container";
newDiv.name = "container";
newDiv.setAttribute("className", "intNew"); //IE
newDiv.setAttribute("class", "intNew"); //FF
var newTextbox = document.createElement("input");
newTextbox.type = "text";
newTextbox.id = idName; //--
newTextbox.name = idName; //Doesn't work in IE?..
newTextbox.setAttribute("className", "newWidth"); //IE
newTextbox.setAttribute("class", "newWidth"); //FF
var text = document.createTextNode(head + ":");
target.appendChild(newDiv);
newDiv.appendChild(text);
newDiv.innerHTML += "<br />";
newDiv.appendChild(newTextbox);
newDiv.innerHTML += "<p />";
}
(The text area function is the same, more or less) The PHP code, if anyone's interested: Code: if($_POST['createBtn'])
{
$head = $_POST['head']; //1
$intro = $_POST['intro']; //2
$question = $_POST['question']; //3
$answer = $_POST['answer']; //3
$image = $_POST['image']; //?
$author = $_POST['author']; //5
$end = $_POST['end']; //4
//sammanfattning
printHTMLTop(9);
$today = date('Y-m-d');
$text = <<<END
<div class="intContainer">
<div class="intHeadRow"><b>$head </b></div>
<div class="stpdIEContainer">
<div class="intTextContainer">
<p />
$intro
<p />
END;
if($question != "" && answer != "")
{
foreach($question as $k)
{
$text .= $k . "<p />";
foreach($answer as $j)
{
$text .= $j . "<p />";
}
}
}
$text .= <<<END
<p />
$end
<p />
<i>Skrivet av: $author den $today</i>
</div> <!-- intTextContainer -->
<div class="intImgContainer"> </div></div> <!-- stpdIEContainer -->
</div> <!-- intContainer -->
END;
//Prints to new file (on server)
$file = file_put_contents('interviews/interview01.html', $text); //Set name
//Add to DB
//print newly created file
$page = file_get_contents('interviews/interview01.html');
echo $page;
printHTMLBottom();
Hi, Can anyone tell me How to send values from application resources.properties file to a java script function in a jsp Thanks in Advance, John Ven Hi Experts here, Pls help. I have written the html code like this: <a href="http://mypage.com/docfiles" target="_blank"> Click </a> But the problem is when ever the user click the click option complete url is displaying in two ways 1)on the buttom of the status bar 2)Right click on the option open the properties than also we are getting the complete url. But we don't want to see the complete url,How to hide the Url. Please give me solution I am struggling alot. Thanks and Regards, Srinivas yadav. I HAVE BEEN TRYING TO FIGURE OUT THE PARAMETERS IN THE FUNCTIONS, INCLUDING THE ARRAYS [i], [p], ["get_" + i], ["set_" + i] AND HOW THE METHODS ARE BEING CALLED IN RELATION TO i, p and val, so that I can make sense of this code. If possible can you explain the code also What I will like to know are the properties and methods of the objects generated in the following code? Also I want to know how I can use those methods to show and change the name and age for the emp2 object. this is the code: function Employee(properties) { for (var i in properties) { if (properties.hasOwnProperty(i) && typeof properties[i] != 'function') { this["get_"+i] = (function(p) { return function() { return properties[p]; }; })(i); this["set_"+i] = (function(p) { return function(val) { properties[p] = val; }; })(i); } } } var emp1 = new Employee({ name: "Bob", age: 35, foo: function() {} }); var emp2 = new Employee({ name: "Gary", age: 54 }); I'm new to JS and I can't get this function to display. Can you help me please?
Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="generator" content="PSPad editor, www.pspad.com">
<title>Untitled</title>
<head>
<script type="text/javascript">
function creatediv(){
var nwdiv=document.createElement('div');
nwdiv.style.float='right'
nwdiv.id='mydiv';
var txt='hello world!';
document.body.apendChild(nwdiv);
document.getElementById(mydiv).innerHTML=txt;
document.write(txt);
}
</script>
<style type="text/css">
</style>
</head>
<body>
<form>
<input type="button" value="Click me!" onclick="creatediv()" />
</form>
</body>
</html>
hello, would you please tell me why my function does not work? what's wrong with my code Code: <html>
<head>
<title> Egypt </title>
</head>
<body>
<form name="myform" action="#" onsubmit="return checkBoxes(this);">
<div align="left"><br>
<input type="checkbox" name="option1" value="Top10"> Top 10 Tourist Attractions of Egypt<br>
<input type="checkbox" name="option2" value="Alexandria"> Alexandria <br>
<input type="checkbox" name="option3" value="POIs"> POIs<br>
<br>
<INPUT TYPE=SUBMIT VALUE="submit">
</div>
</form>
<script type="text/javascript">
function checkBoxes(theForm) {
if (
theForm.option1.checked == false &&
theForm.option2.checked == false &&
theForm.option3.checked == false)
{
alert ('You didn\'t choose any of the checkboxes!');
return false;
} else {
return true;
}
</script>
</body>
</html>
Hi! What am doing wrong? The script works -- identifies blank fields -- but the second function (change_subject) is ignored. This is the script: Code: <HEAD>
<script>
function is_filled()
{
if (form_1.realname.value=="")
{
alert("Please enter your name")
form_1.realname.focus()
return false
}
if (form_1.subject.value=="")
{
alert("Please enter a subject")
form_1.message.focus()
return false
}
else
return true
};
function change_subject
{
form_1.subject.value="form_1.realname.value + '_' + form_1.subject.value"
};
</script>
</HEAD>
This is the FORM (used for MSA FormMail): Code: <form name="form_1"; onSubmit="return is_filled()"; on Submit="change_subject()"; method="post"; action="http://gb2gf.org/cgi-sys/FormMail.cgi">
<input type="hidden" name="recipient" value="drt@gb2gf.org">
<input type="hidden" name="required" value="greeting,realname,city_state,email_1,email_2,message">
<input type="hidden" name="sort" value="order:greeting,realname,city_state,email_1,email_2,message">
<input type="hidden" name="redirect" value="http://www.gb2gf.org/thanks.htm">
<!-- Input fields here -->
</form>
Thanks! Dr. T. I made a 50th anniversary guestbook to add memories/etc about our organization. The people can look at the entries and then if they want to add one of there own, there's a link that should pop up a form in a new for them to add it. I have no idea why this pop is not working in Internet Explorer (both IE6 and 7). It works beautifully in Firefox. I have no idea how you can go wrong with window.open. I'm stuck. Again, only the actual pop up function doesn't work. Everything else seems to be working fine. I included all of my code though even for the tab navigation because the link to the pop up form changes based on what tab they are in (i.e. if they're looking at the past memories tab and click on the link, it takes them to the past memories form). I know it's probably TMI on the code, but I thought it might be somehow related and better safe than sorry, right? HTML Page Code: <html>
<head>
<title>50th Anniversary Reflections</title>
<script type="text/javascript" src="js/guestbook.js"></script>
<link href="css/guestbook.css" media="all" type="text/css" rel="stylesheet">
</head>
<body>
<div id="guestbook_container">
<div id="tab_nav_container">
<ul>
<li><div id="tab_1" class="tabs_on" onclick="tabsClass.switchTab(this);"><a target="gstbk_frame" href="guestbook_query.asp?cat=1" onclick="change_value(1);">Past Memories</a></div></li>
<li><div id="tab_2" class="tabs_off" onclick="tabsClass.switchTab(this);"><a target="gstbk_frame" href="guestbook_query.asp?cat=2" onclick="change_value(2);">Career Impact</a></div></li>
<li><div id="tab_3" class="tabs_off" onclick="tabsClass.switchTab(this);"><a target="gstbk_frame" href="guestbook_query.asp?cat=3" onclick="change_value(3);">Future Wishes</a></div></li>
<li><div id="new" class="tabs_off" onclick="popupform();">Share Your Memories</div></li>
</ul>
</div><!-- end tab_nav_container -->
<div id="tab_content_container">
<div id="tab_1_data" class="tab_content"><p class="tab_category">What is your most important memory of NACUA?</p></div>
<div id="tab_2_data" class="tab_content" style="display: none;"><p class="tab_category">How has NACUA benefitted you and your career?</p></div>
<div id="tab_3_data" class="tab_content" style="display: none;"><p class="tab_category">What is your most important wish or hope for NACUA's future?</p></div>
</div><!-- end tab_content_container -->
<script type="text/javascript">
tabsClass.addTabs("tab_nav_container");
</script>
<br class="clear" />
<div id="iframe_container">
<iframe name="gstbk_frame" id="gstbk_frame" src="guestbook_query.asp?cat=1" width="730px" height="550px" scrolling="auto" frameborder="none"></iframe>
</div><!-- end iframe_container -->
<br class="clear" />
</div><!-- end guestbook_container -->
</body>
</html>
Here's the guestbook.js file: Code: //***** ASSIGN/CHANGE CATEGORY VALUES *****
function popupform(){
var href;
href="guestbook_submission_form.asp?cat="+catValue;
window.open(href, "Submission Form", 'width=600, height=400, scrollbars=no');
}
var catValue = "1"
function change_value(catChange){
catValue=catChange;
change_text();
}
function change_text(){
if(catValue=="1"){
document.getElementById("new").innerHTML = "<a href='#' style='color:#ffffff;'>Share Your Memories!</a>";
}
if(catValue=="2"){
document.getElementById("new").innerHTML = "<a href='#' style='color:#ffffff;'>Share Your Career Experiences!</a>";
}
if(catValue=="3"){
document.getElementById("new").innerHTML = "<a href='#' style='color:#ffffff;'>Add Your Own Wish!</a>";
}
}
//***** ASSIGN/CHANGE VALUES AND TABS *****
function assignCategory(cat){
document.form.category.value=cat;
}
function onLoadAssignAndSwitch(cat){
assignCategory(cat);
tabsClass.addTabs("tab_nav_container");
var initialTab = "tab_" + cat + "_data"
if (initialTab != "tab_1_data"){
document.getElementById(initialTab).style.display = "";
document.getElementById("tab_1_data").style.display = "none";
}
document.getElementById("tab_" + cat).className = "tabs_on";
}
function assignAndSwitch(element, cat){
tabsClass.switchTab(element);
assignCategory(cat);
}
//***** TABBED MENU *****
var tabsClass = {
tabSetArray: new Array(),
classOn: "tabs_on",
classOff: "tabs_off",
addTabs: function (tabsContainer) {
tabs = document.getElementById(tabsContainer).getElementsByTagName("div");
for (x in tabs) {
if (typeof(tabs[x].id) != "undefined") {
this.tabSetArray.push(tabs[x].id);
} else {}
}
},
switchTab: function (element) {
for (x in this.tabSetArray) {
tabItem = this.tabSetArray[x];
dataElement = document.getElementById(tabItem + "_data");
if (dataElement) {
if (dataElement.style.display != "none") {
dataElement.style.display = "none";
} else {}
} else {}
tabElement = document.getElementById(tabItem);
if (tabElement) {
if (tabElement.className != this.classOff) {
tabElement.className = this.classOff;
} else {}
} else {}
}
document.getElementById(element.id + "_data").style.display = "";
element.className = this.classOn;
}
};
I'm not that advanced in javascript (although not a total idiot) Any help and/or suggestions would be greatly appreciated! Thank you! I've been trying for several hours to solve this University problem but I'm just unable to get it done. I'm supposed to create a function that takes an array with all the A,B,C,D ... and shift them one place to the right (for instance array of A,B,C,D should be shifted and be like D,A,B,C - the last character goes to first position) Here is the code that I've been dealing with: Code: var abcArray = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
function shift(anyArray)
{
var newArray = Array(anyArray.length);
for (var position = 0; position < newArray.length; position = position + 1)
{
if (position == 0)
{
newArray[position] = anyArray[anyArray.length - 1];
}
else
{
newArray[position] = anyArray[position - 1];
}
}
anyArray = newArray;
}
shift(abcArray);
document.write(abcArray);
If I remove the function and try this code directly on the array it does work, but when I use the code as it is just like you see - the function shift doesn't change the Array and doesn't shift the values inside one position to the right and I have no clue why. Anyone has some ideas?! hello, I posted a threat a couple of days ago, but i got no answer. I guess it was just too messy. So i'm trying over again. You might therefore have a little deja vu, but still, any help will be greatly appreciated. I need this function to work on all my div, separately, on loading. here is the function: Code: <script>
// Random Position Script
var xxx = Math.floor(Math.random()* (pageWidth()-230));
var yyy = Math.floor(Math.random()* (pageHeight()-50));
function start()
{var x = (posLeft()+xxx) + 'px';
var y = (posTop()+yyy) + 'px';
moveObjTo('myobj',x,y);
setObjVis('myobj','visible');}
window.onload = start;
window.onscroll = start;// JavaScript Document
</script>
At the moment, the function is working on one object ('myObj'). I laced all my documents into separate divs and i need them all (and seperatly) to load on a random position at start. So i need to write in something that makes this function keep on going for all my objects. It might seem like a very dumb question, but 'm just starting with javascript, so not much of a coder yet. Hope you can help o this one. nice day to everybody! Hey guys, I'm beginning to learn javascript, and I've come across functions like the one below in many scripts. I just don't understand the purpose of the parameter! Nothing is being passed into the function when it's being called- so what's the point of specifying an argument??? Code:
function doSomething(e) {
if (!e) var e = window.event;
alert(e.type);
}
Why not: Code: function doSomething() {
var e = window.event;
alert(e.type);
}
My switch function just goes to the default. I've double double checked the file paths of the image on the page and it's right. So I'm not sure what's going on. here's what I got: Code: function change2(picName,imgName)
{
switch (document[picName].src)
{
case document[picName].src= "images/leaf_shapes/leaf_auriculate.gif":
document[picName].src = "images/leaf_shapes/crenate/leaf_elliptic_crenate.gif";
break;
case document[picName].src= "images/leaf_shapes/leaf_cordate.gif":
document[picName].src= "images/leaf_shapes/serrate/leaf_elliptic_serrate.gif";
break;
default:
document[picName].src= "images/leaf_shapes/transparent1.gif";
}
}
I don't get to use javascript as much as I would like, but I am having a problem with a page so I stripped out all the extras and got down to just the part I am having a problem with and I think this should fill the div with the id testingdiv when the page loads but it doesn't. Any help would be appreciated. Code: <script type="text/javascript">
function getClientList(listtype) {
document.getElementById('testingdiv').innerHTML = listtype;
}
window.onload = getClientList('own');
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<input type="hidden" name="hidden" id="hidden" value="99" />
<title>untitled</title>
</head>
<body>
<div id="testingdiv"></div>
</body>
</html>
We have created this function with loops and arrays Problem is the loops work only when I take out the function when the function is in place, nothing works, it is part of exercise anyone have suggestions here is my code Code: title>Congressional Races</title>
<link href="results.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="votes.js"></script>
<script type="text/javascript">
function totalVotes(votes){
var total=0;
for (var i = 0; i <votes1.length; i++) {
total = total + votes1[i];
}
document.write(total);
}
</script>
}
</head>
<body>
thanks all who can help Hello codingforums! I'm new to javascript and have a problem regarding functions. I've been trying to create a slideshow, and while testing different syntax etc. I'm getting stuck at why this works: Code: document.images.portrait.src = img2.src; And not this: Code: function slideshow(){
document.images.portrait.src = img2.src;
}
Thanks for any help! |
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