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JavaScript - Pass A Function As A Parameter?
Hi all
I'm adding buttons to my google map through a loop. I pass some parameters, and the addButtons() function creates the buttons. How can I pass the "task" for the button to the function? In the addDomListener line below, I'm now writing the function name literally, I'd like find a way with a parameter. Thank you.. Code: // The loop...
for (i=0;i<=4;i++) {
oCC = addButtons(aCtrls[i],'btnContainerChild');
...
}
// The function...
function addButtons(cButtonID,cClassName) {
var oButton = document.createElement('DIV');
oButton.className=cClassName;
oButton.id=cButtonID;
//... other settings here...
// ===> Here, I'd like to set the click function through a parameter
google.maps.event.addDomListener(oButton, 'click', function()
{gmapSetCenter(defaultCenter)});
Similar TutorialsHello again! Is there any way to pass a function(with its parameters) to another function using a parameter? Examples: Here is how I do it now: PHP Code: function output(text){ alert(text); } function bla(text, func){ output(text); } bla("Text is here", output) //Outputs "Text is here" I only want to pass the function to bla() as a parameter. I need something like this: PHP Code: function output(text){ alert(text); } function bla(func){ output(); } bla(output("Text is here")) //Outputs "Text is here" Is this possible in some way? Thanks in advance. Hi, I have an "offline" html demo of 50+page - so it needs to run on standard html/javascripts... I'm trying to do this: Page A Code: <a href="pageb.html?endpage=pageD.html">Page B.html</a> <a href="pageb.html?endpage=pageE.html">Page B.html</a> <a href="pageb.html?endpage=pageF.html">Page B.html</a> Page B Code: <a href="PageC.html?endpage=(the parameter of page A)">Page C</a> <a href="(the parameter of page A)">End Page</a> Page C Code: <a href="(the parameter of page A)">End Page</a> I've searched for a couple of hours already and I just can't seem to find this... I'm not that great at javascripts... Thanks a lot! Hi, I am learning javascript from a book ("Javascript and JQuery Missing Manual") and one example there sets my head spinning and I can't understand how the script works. I'd be very grateful if someone could write a few words about the aspect I don't understand. Basically it is line seven I don't understand. How is the word question tied to the items in the questions array. I understand the 0 and 1 on line eight and nine and why they focus on the first and second item in the sub-array, but still, how can the word question point to the relevant item in the questions array? Code: var score = 0;
var questions = [
['How many moons does Earth have?', 1],
['How many moons does Saturn have?', 31],
['How many moons does Venus have?', 0]
];
function askQuestion(question) {
var answer = prompt(question[0], '');
if (answer == question[1]) {
alert('Correct!');
score++;
} else {
alert('Sorry. The correct answer is ' + question[1]);
}
}
for (i=0; i<questions.length; i++) {
askQuestion(questions[i]);
}
I have a good understanding of javascript although I am new to working xml. So I am having a problem getting javascript to recognize that my parameter value in my function call is an attribute in my xml. I called the js function like this: Code: <a href="#" onClick="ebookCategory(marketing);">Marketing</a> Here is my js function: Code: var category;
function ebookCategory(category) {
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","ebook.xml",false);
xmlhttp.send();
xmlDoc=xmlhttp.responseXML;
document.write("<table border='1'>");
var x=xmlDoc.getElementsByTagName(category);
for (i=0;i<x.length;i++)
{
document.write("<tr><td>");
document.write(x[i].getElementsByTagName("bookCover")[0].childNodes[0].nodeValue);
document.write(x[i].getElementsByTagName("title")[0].childNodes[0].nodeValue);
document.write(x[i].getElementsByTagName("description")[0].childNodes[0].nodeValue);
document.write(x[i].getElementsByTagName("price")[0].childNodes[0].nodeValue);
document.write("</td><td>");
i++;
document.write(x[i].getElementsByTagName("bookCover")[0].childNodes[0].nodeValue);
document.write(x[i].getElementsByTagName("title")[0].childNodes[0].nodeValue);
document.write(x[i].getElementsByTagName("description")[0].childNodes[0].nodeValue);
document.write(x[i].getElementsByTagName("price")[0].childNodes[0].nodeValue);
document.write("</td></tr>");
}
document.write("</table>");
} // end ebookCategory()
Some of the aspects in this function are new to me, xml stuff. Here is my xml setup: Code: <ebook category="marketing"> <bookCover><img src="/millionaire/ebooks/covers/miracle2.jpg" height="150" width="150" /></bookCover> <title>Marketing Miracle</title> </ebook> I appreciate any help in the matter Please advise me: I've successfully called a variety of functions that have no parameter value such as: function expand() //expand() in this line is merely an example But I'm unsuccessful calling a function with a paramter value such as: function expand(id) Here is the the call line: document.addEventListener("DOMContentLoaded", expand(id) , false); Here is the Function: function expand(id) { for (var i = 1; i<=10; i++) { if (document.getElementById('smenu'+i)) { document.getElementById('smenu'+i).style.display='none'; } } if (id) { id.style.display='block'; } } Hey guys, i have a question about my array. I have an array called numberarray with 20 elements and i want it to be accepted into a function as a parameter? But i only want the first 10 to be accepted. Does anyone know exactly how i would go about doing this in my function?
Code: <!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script>
window.onload = function(){h = parseInt(document.getElementById( "div1" ).style.height);}
var t;
function addHeight(openAccordionID){
clearInterval(t);
document.getElementById(openAccordionID).style.height = h+"px";
h+=1;
t = setInterval("addHeight('"+openAccordionID+"')",10);
for(var x=1; x<h; x++)
if(h%(x*100)==0){clearInterval(t);}
}
</script>
</head>
<body>
<div id="div1" onclick="addHeight(this.id)" style="width: 200px; height: 20px; background-color: yellow;">Increase Height</div>
</body>
</html>
How can I still use the parameter "openAccordionID" in the blue-highlighted part? I tried, but it failed. Hi all, I need to pass a variable to an inner function and I got it to work but: (1) I don't know why it works (2) I don't know if it's right or optimal So, please look and comment: Code: for (var h = 1.0; h <= 3.0; h += 0.5) {
ed.settings.formats['spacing' + String(h.toFixed(1))] = {
'block' : 'p',
'styles' : {
'marginBottom' : String((h - 1).toFixed(1)) + 'em'
}
}
h = (function (h) {
c.onRenderMenu.add(function (c, m) {
m.add({
'title': String(h.toFixed(1)),
'caption' : 'Set the line spacing to ' + String(h.toFixed(1)),
'onclick': function () {
ed.formatter.apply('spacing' + this.title);
return false;
}
}).setDisabled(false);
});
return h;
})(h);
};
You can ignore a lot of the code as it doesn't factor into the question... and I know that re-ordering the code can eliminate my problem (but I can't re-order it because defining the formats MUST come before "renderMenu" or else it doesn't work - and I don't want to use two loops - one to define the formats and another to define the menu). The part that's freaking me out is this: Code: h = (function (h) {
c.onRenderMenu.add(function (c, m) {
m.add({
'title': String(h.toFixed(1)),
'caption' : 'Set the line spacing to ' + String(h.toFixed(1)),
'onclick': function () {
ed.formatter.apply('spacing' + this.title);
return false;
}
}).setDisabled(false);
});
return h;
})(h);
See the strange things I have to do to get h inside of c.onRenderMenu.add()? Is this right? Can I do it any "better" or more correctly? Thanks! -- Roger Here's something that I tested without the PHP and it worked ok. Now that I've introduced the PHP to the document it doesn't work. The PHP variable is not passing to Javascript properly. By use of some cleverly placed alert boxes, I figured out that the only thing that is getting passed forward is something called : "object HTML ImageElement" Specifically, I assign the element ID the unique ID number of the record in the SQL database. The problem isn't with the ID numbers themselves: They are alphanumeric and unique. I think it boils down to one of two lines of code. Either this isn't working (about line 12) Code: function expander(RecordID){
or perhaps it is when I am calling the function (about line 66): Code: echo "<img id='".$row['IDNumber']."' src=".$row['ImagePath']." width='5%' onMouseOver='expander(".$row['IDNumber'].");' onMouseOut='shrinker(".$row['IDNumber'].");'>";}
The PHP works (I can get the images to appear, so the connection to SQL and such isn't a problem). I am sure most of the JavaScript is good, too, as I said I had it all working prior to dropping in the PHP. Since I am not going from JavaScript to PHP I don't think I need AJAX. I just need the PHP to pass to JavaScript. Any ideas? Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="class.css" />
<script type = "text/javascript" language="javascript">
//<![CDATA[
var maxheight = 150;
var countShrink = 1;
function expander(RecordID){
var countGrow = 1;
var pic = document.getElementById(RecordID);
if(pic){
var imageh = pic.height;
var imagew = pic.width;
if(imageh<100){
countGrow++;
imageh = imageh*1.2;
imagew = imagew*1.2;
pic.style.height = imageh + "px";
pic.style.width = imagew + "px";
var timer = window.setTimeout(function(){expander(RecordID);},2);}
}
else
{alert("error on");}
}
function shrinker(RecordID){
var pic = document.getElementById(RecordID);
if(pic){var counter = 1
var imageh = pic.height;
var imagew = pic.width;
if(imageh>20){
imageh = imageh/1.2;
imagew = imagew/1.2;
pic.style.height = imageh + "px";
pic.style.width = imagew + "px";
var timer = window.setTimeout(function(){shrinker(RecordID);},3);}
}
else
{alert("error off");}
}
//]]>
</script>
</head>
<body>
<?php
include('menuSub.html');
require_once('connect.php');
$idnum = 'phmdv06tbu';
//$q="SELECT * FROM art WHERE IDNumber = '".$idnum."'";
$q="SELECT * FROM art ORDER BY IDNumber LIMIT 4";
$r = @mysqli_query ($dbc, $q);
echo "<div class='bodyContent'><div class='imageContent'>";
if($r){
while ($row = mysqli_fetch_array($r,MYSQLI_ASSOC)){
echo "<img id='".$row['IDNumber']."' src=".$row['ImagePath']." width='5%' onMouseOver='expander(".$row['IDNumber'].");' onMouseOut='shrinker(".$row['IDNumber'].");'>";}
}
else{
echo '<div class="bodyContent"> Error<div>';
}
echo "</div></div>";
mysqli_close($dbc); ?>
</body>
</html>
hi guys! i have a problem in passing the variable to function ,the variable which is used in<td> as table data. Code: <td onmouseover="todayevent(somevarible);" onmouseout="hideevent(somevarible);" >' + somevarible+ '</td> i want to pass somevariable by function todayevent(). how can i do this. plz help me someone. Hello all I have a big problem I have my php like this Code: <?
$codid=$_GET["cid"];
echo "
<script>
setTimeout(function() {CSelect();}, 100) ;
</script>
<div id=\"ReloadThis\"></div>";
?>
And my js funtion Code: function CSelect()
{
var
$http,
$self = arguments.callee;
if (window.XMLHttpRequest) {
$http = new XMLHttpRequest();
} else if (window.ActiveXObject) {
try {
$http = new ActiveXObject('Msxml2.XMLHTTP');
} catch(e) {
$http = new ActiveXObject('Microsoft.XMLHTTP');
}
}
if ($http) {
$http.onreadystatechange = function()
{
if (/4|^complete$/.test($http.readyState)) {
document.getElementById('ReloadThis').innerHTML = $http.responseText;
setTimeout(function(){$self();}, 10);
}
};
$http.open('GET', 'linii_c/select.php'+'?cod='+' PHP VARIABLE ', true);
$http.send(null);
}
}
who i can put my php variable into the funtion? Thanx in advence and sorry for my bad english! I have a php script which dynamically creates a table containing text boxes with variable names. Example: Code: echo '<td align="center" bgcolor="'.$bgcolor.'"><input type="text" name="payable_'.$key.'" id="payable_'.$key.'" value="'.$payable.'" size="3" maxlength="4" /></td> '; In the above instance the text box name might be 'payable_23323'. I need to code an onKeyUp event which sends the text box name to a function, and in that function I need to retrieve the text box name and the string after 'payable_' together with the value the user has input into the text box. Any help is greatly appreciated . . . I have been Googling this for hours to no avail - probably because I don't know what to search for . . . Thanks hello, only just starting using javascript, so question may not make sense but il try anyway. if i group some javascript into a function that returns false; how could i carry that 'false' out of the function so it can be used outside the function. the example below shows the validate function checks for a condition then returns false if it is met. i want this false to then be passed out of the function to then throw an error in its containing function. (goal to prevent the submitting of a form) if (checBox =="1"){ validate(); } function proceed(); function validate() { if (chilD1.value >70) { alert("Please enter your Childs correct Age"); return false; chilD1.focus(); } } i dont want the proceed function to be called, so how can the other function prevent this. Now i realise that the validate function could be incorporated into the top level function but, my form will eventually be quite large with a multiplitude of fields so i need to know how i can call back to functions and use them as objects insteasd of repeating lots of code. Hope you can help thanks. I have a simple function to display an image when called, but if I try to rewrite the function to take the image as an argument, it stops working. I've looked at other function examples on the web but can't figure out what I am missing. Can anyone help? works: Code: <html>
<script language="JavaScript">
var ImagePlusSign = '<img src="plus.jpg" name="slide" width="65" height="50"/>';
function FlashImagesThenWait()
{
document.getElementById("first").innerHTML = ImagePlusSign
}
setTimeout(FlashImagesThenWait, 1500);
</script>
<body>Hello.
<div id="first">
</div>
</body>
</html>
does NOT work : Code: <html>
<script language="JavaScript">
var ImagePlusSign = '<img src="plus.jpg" name="slide" width="65" height="50"/>';
function FlashImagesThenWait(z)
{
document.getElementById("first").innerHTML = z
}
setTimeout(FlashImagesThenWait(ImagePlusSign), 1500);
</script>
<body>Hello.
<div id="first">
</div>
</body>
</html>
hello all, I am new to javascript, i just wanted to know how can i send a array from perl to javascript function.... if anybody having any idea about this please reply me..thanks in adbvance How to: pass local variable from <head> JS function to <body> textarea I have a JS function in the head that calculates a variable. the function is triggered by the vevent of a button click. when calculation is done, how is it sent back to the page and placed in a textarea or textbox....?? /Beginner issues :/ Hi I have this code which works fine: Code: <td class="Content_TD" onclick="_gaq.push(['_trackEvent', 'navigation ', 'link', 'blocks']); window.open('http://www.google.dk/');">
But I dont now the parameters instead of window.open, if I want it to open on top. Can somebody please help me? Thanks in advance Claus I have to use get method (instead of post) for form action but dont want to show the url parameter in the action page url. Anyway to hide or encrypt a form input value after it goes into my database? Code: <form action="actionpage.cfm" method="get"> <input type="text" name="myValue"> <input type="submit" name="submit"> </form> Hi I am in doubt if im doing this correct. I have a TD which I have a onclick and a google event tracking code on. But om not shure if I have set it up correct. The () and the , might be wrong..? <td class="Content_TD" onclick="(window.open('http://www.google.com/')), (_gaq.push(['_trackEvent', 'navigation', 'link', 'event']));"> Thanks in advance! |
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