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JavaScript - Return Elements Id
Im working on a function where i need to return the active elements ID.
the element will have class="main" id="1" onmouseover="showSub()"> Would someone be able to write me a simple function which simply puts the elements ID number in an alert box? I can figure out the rest i need from that . Thanks, Tom Similar Tutorialsso my code is supposed to retrieve three values from a flash element. now it works fine, but when it retrieves a 0 from any of the three valuse, it goes all haywire.... how could i put in a statement or command that if it returns 0, that all it will display is a 0 instead of returning "NaN"? But since all three valuse added together are supposed to equal 100% i have to run the numbers through a little bit of division and rounding after it gets the value of each one. Code: var techfaction = document.getElementById('tfaction');
var natfaction = document.getElementById('nfaction');
var magfaction = document.getElementById('mfaction');
retrFaction();
roundNumber();
function retrFaction()
{
var values = document.documentElement.innerHTML.match(/factiontrianglesmall\.swf\??.*\\x26link/i)[0].match(/[0-9.]{4,9}/ig);
techfaction.innerHTML = roundNumber(values[0] / 30, 1) + '%';
natfaction.innerHTML = roundNumber(values[1] / 30, 1) + '%';
magfaction.innerHTML = roundNumber(values[2] / 30, 1) + '%';
}
function roundNumber(num, dec)
{
var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
return result;
}
I don't understand the logic of Break, Return False, Return True. It was never really covered in our college class, and I see everyone using it. I got an A in the class, if that 'proves' that I really tried to apply myself. NOTE: I understand what the function is doing. I just don't understand WHEN to use break, return false or return true if the the translator can determine the conditional statements. PHP Code: function submitForm(){ var ageSelected = false; for (var i=0; i<5; ++1){ if (document.forms[0].ageGroup[i].checked == true) { ageSelected = true; break; } } if (ageSelected == false){ window.alert("You must select your age group"); return false; } else return false; } if the the translator can determine the conditional statements, why not write it like this: PHP Code: function submitForm(){ var ageSelected = false; for (var i=0; i<5; ++1){ if (document.forms[0].ageGroup[i].checked == true) { ageSelected = true; break; // what's the point for the 'break'? Won't the rest of the code be ignored since it passed the first condition? } } if (ageSelected == false){ window.alert("You must select your age group"); return false; } // why not leave the last else out? is it just a 'safety' catch, in case something other than true or false is inputted? else return false; // what's the point? } Questions: Why use return true, if the translator knows it's ture? Why use "return false" if the translator knows it's false and the alert window has already gone up? why not use "break" to stop the code? Why use the "return false" at the end "else" statement? Hi room, Hey, I opened up the source code for this page in google chrome and since i'm learning javascript, i wanted see if i could "read" it and figure out what was going on. I'm am having the hardest time understanding "return false" and "return true". Could someone step me through this via interpreting this code (in bold typeface): Code: var DefaultValue = 'Search';
function clearSearch() {
if (document.searchForm.q.value == DefaultValue) {
document.searchForm.q.value = '';
}
}
function validateSearchHeader() {
if ( document.searchForm.q.value == '' || document.searchForm.q.value.toLocaleLowerCase() == DefaultValue.toLocaleLowerCase() ) {
alert('Please enter at least one keyword in the Search box.');
document.searchForm.q.focus();
return false;
}
return true;
}
Thanks! i have this in my javascript code but have no idea on how a returned value works/where does it return to???? what do i do/or can i do with a value that gets returned??? i am asking this so i can learn on how to use it cos i am new to all this and dont know how it works...please show/explain to me please? thanks here my full code: PHP Code: <?php use_stylesheets_for_form($form) ?> <?php use_javascripts_for_form($form) ?> <html> <head> <script type="text/JavaScript"> function refreshPage(s) { window.location.reload(); if((s.options[s.selectedIndex].value) = "zed-catcher") { var $index = s.selectedIndex; var $value = s.options[$index].value; alert (s.selectedIndex); alert ($value); window.location.reload(); [COLOR="Red"]return &value; //where does it return to ???? how/what to do with a return value???[/COLOR] } } </script> </head> </html> <body> <form action="<?php echo url_for('adminservice/'.($form->getObject()->isNew() ? 'create' : 'update').(!$form->getObject()->isNew() ? '?id='.$form->getObject()->getId() : '')) ?>" method="post" <?php $form->isMultipart() and print 'enctype="multipart/form-data" '?>> <?php if (!$form->getObject()->isNew()): ?> <input type="hidden" name="sf_method" value="put" /> <?php endif; ?> <table > <tfoot> <tr> <td colspan="2"> <?php echo $form->renderHiddenFields(false) ?> <a href="<?php echo url_for('adminservice/index') ?>">Back to list</a> <?php if (!$form->getObject()->isNew()): ?> <?php echo link_to('Delete', 'adminservice/delete?id='.$form->getObject()->getId(), array('method' => 'delete', 'confirm' => 'Are you sure?')) ?> <?php endif; ?> <input type="submit" value="Save" /> </td> </tr> </tfoot> <tbody> <?php echo $form->renderGlobalErrors() ?> <tr> <th><?php echo $form['name']->renderLabel() ?></th> <td> <?php echo $form['name']->renderError() ?> <?php echo $form['name']?> </td> </tr> <tr> <th><?php echo $form['logo_url']->renderLabel() ?></th> <td> <?php echo $form['logo_url']->renderError() ?> <?php echo $form['logo_url'] ?> </td> </tr> <tr> <th><?php echo $form['call_center_number']->renderLabel() ?></th> <td> <?php echo $form['call_center_number']->renderError() ?> <?php echo $form['call_center_number'] ?> </td> </tr> <tr> <th><?php echo $form['catcher_id']->renderLabel(); $catcher_id = $form->getObject()->getCatcherId(); $catcher = LpmCatcherPeer::getByCatcherId($catcher_id); $catcher_name = $catcher->getName(); ?></th> <td> <?php echo $form['catcher_id']->renderError() ?> [COLOR="Red"]<select name="services" onchange="refreshPage(this.form.services)">[/COLOR] <?php $catcher_names = LpmCatcherPeer::getByAllNames(); foreach($catcher_names as $row) { ?> <option value="<?php echo $row->getName()."/".$row->getId();?>" <?php if($row->getName() == $catcher_name) echo ' selected="selected"'; ?> ><?php echo $row->getName();?></option> <?php } [COLOR="Red"]if ($row->getName() == "zed-catcher") //just thought with the return in my java script i can pass the newley selected value back to here and if it meets the if i echo these lines?? { echo $form['service_code']->renderLabel(); echo $form['service_code']->renderError(); echo $form['service_code']; } [/COLOR] ?> </select> </td> </tr> <tr> <th><?php echo $form['price_description']->renderLabel() ?></th> <td> <?php echo $form['price_description']->renderError() ?> <?php echo $form['price_description'] ?> </td> </tr> </tbody> </table> </form> </body> thanks! i'm trying to get some information with this code from my database: Code: function getTableSize(tableName){
db.transaction
(
function(tx)
{
tx.executeSql
('SELECT * FROM '+ tableName,[] , function(tx, r)
{
return r.rows.length;
}
);
}
);
}
but it doesnt work and i cant figure why what i want is that this function return the table size to one variable in another function...something like: Code: var groupTableSize = getTableSize('groups');
I have a javascript that takes information from a form and recompiles that information into a readable shift report. The problem I am having is with returns in the textareas. I tried: Code: theReport = theReport.replace("
","<br>"
but that space puts the rest of the var on a different line and screws with the results. How can I replace a return with <br>? I want the output to be this way Student: Doe, John eMail: jd@email.com Course ID: COIN-O70A.01 ----------------------- Can any one pls help me with the display. If I use alert instead of return then I works. But I need to display it in the document. Code: <html>
<head>
<title>Variable - Examples 1</title>
<script type="text/javascript">
function Student(firstName, lastName, email,courseID){
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
this.courseID = courseID;
}
Student.prototype = {
constructor : Student,
toString : studentInfo
};
function studentInfo(){
return this.firstName + "," + this.lastName + '\n'+ this.email + '\n' + this.courseID;
}
var student = new Student("Doe", "John", "Doeohn@gmail.com","COIN 70A.01");
</script>
</head>
<body>
<script type="text/javascript">
document.writeln(student.toString());
</script>
</body>
</html>
i achieved to make a chain: Code: function getId(id) {
id_elem = document.getElementById(id);
return {
color:function(e){
id_elem.style.color = e;
}
};
}
so this can be getId("test").color("red"); but what happens if i want to do that? Code: function getId(id) {
id_elem = document.getElementById(id);
return id_elem;
return { ????......
how can i chain if i use return in the first place? hi,i don't understand about the jquery basic example the code is below PHP Code: <html> <head> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("button").click(function(){ $('p').addClass(function(n){ return 'par_' + n; }); }); }); </script> <style type="text/css"> .par_0 { color:blue; } .par_1 { color:red; } </style> </head> <body> <h1>This is a heading</h1> <p>This is a paragraph.</p> <p>This is another paragraph.</p> <button>Add classes to p elements</button> </body> </html> i want to understand about the how is work function(n){ in the function a and how work return function return 'par_' + n; thanks mate Hello, How can this be made to return confirmation? <form id="score_form" method="post" action="addscore.php"><input id="score" name="score" value="" type="hidden"><img id="collect" style="cursorointer;height: 37px; width: 100px; margin-top: 13px;" src="./collectlive.gif" onclick="collect_points();"></form> Letsay the confirmation window would say"ARE YOU SURE" hi, i wanna get the value from javascript to php variable. here is my code, <html> <body> <select name="drop" size="10" onchange="drp_selectd_value(this)"> <option>One</option> <option>Two</option> <option>Three</option> <option>Four</option> <option>Five</option> </select> <?php echo "The PHP value".'<script>value_return();</script>'; $p='<script>y;</script>'; ?> </body> </html? <script> var x; var y=100; function drp_selectd_value(sdf) { x=sdf.value; alert("Value is : " +x); value_return(x); } function value_return(val) { alert("Second Function calling : "+val ); return val; } </script> This code does not working!!! How can i fix tis problem???I m expecting for the reply.. Thanks in advance Have a jsp page with 10 editable fields and in last Add Button.Now when user edit a field from value 10 to 20(example)and click on Add .Value will be changed and focus will return to the same field.similarly for other fields.how to to .any code sample?
Got a timing issue with sending a URI string out to a server side script right before a client side form validation process returns true.. The problem is that the return true gets called to quickly for the submission of the URI string to be completed. So my question is, might there be a way to mix a return and a setTimeout? If so, could some one give a an example? Thanks! The website I'm updating is peachbasketonline.com. I am not the original web designer. I'm trying to reach an install page that is located in the directory, but anytime I go to a page outside of the site navigation (i.e. part of site navigation: About Us works fine, versus a page outside of site navigation: peachbasketonline.com/anythingelse) it automatically takes you back to the home page. Is there enough info here for someone to tell me if javascript is doing this? I just don't know what I'm looking for. Hello Coders, I am not a coder so this is a problem to me to solve this error. I checked javascript at JSLint and it droped me a error: Code: Problem at line 29 character 17: Unreachable 'break' after 'return'. break; Problem at line 50 character 21: Unreachable 'break' after 'return'. break; and the script is: Code: <html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
function keyDown(key) {
if (currentstep == "1") {
switch (key) {
case 17:
if (key1pressed == "") {
changeKeyStyle("key1", "down");
key1pressed = "1";
showobj("step2");
}
break;
case 67:
if (key2pressed == "") {
changeKeyStyle("key2", "down");
key2pressed = "1";
}
if (key1pressed == "1" && key2pressed == "1") {
step1Complete();
return false;
break;
}
break;
default:
}
} else if (currentstep == "2") {
switch (key) {
case 18:
if (key1pressed == "") {
changeKeyStyle("key1", "down");
key1pressed = "1";
showobj("step2");
}
break;
case 68:
if (key2pressed == "") {
changeKeyStyle("key2", "down");
key2pressed = "1";
if (key1pressed == "1" && key2pressed == "1") {
step2complete();
return false;
break;
}
}
break;
default:
}
}
}
</script>
</body>
</html>
Thank you for all your help, Arnas Hi Guys, I want to develop a javascript code which will open a pop up window and a JSP page in it. That JSP page will load a 'Select' list which user will select a value from and I want that value to be returned to my parent form (window). I remember implementing the same long time back (almost 5years now) ...can anyway help remind me how did I do it...or how can I do it? Regards, -- SJunejo Its a ads rotation code: Don know why it doesnt work... Code: <body>
<div align="center">
<script>
var brw=navigator.appName;
var id;
if(brw == "Netscape") id=1;
if(brw =="Microsoft Internet Explorer") id=2;
if(brw == "Opera") id=3;
var delay=10000;
var k=0;
var fcontent=new Array();
var b=new Array();
function go(k) {
b[0]=''
b[1]='<iframe src="http://........." width="460" height="60" scrolling="no" name="cpm" frameborder="0"></iframe>'
b[2]='<iframe width="468" height="60" allowtransparency="false" frameborder="0" hspace="0" vspace="0" marginheight="0" marginwidth="0" scrolling="no" src="http://............"></iframe>'
b[3]='<iframe width="468" height="120" allowtransparency="false" frameborder="0" hspace="0" vspace="0" marginheight="0" marginwidth="0" scrolling="no" src="http://............"></iframe>'
if(id != 3)
b[4]='<iframe width="1" height="1" allowtransparency="false" frameborder="0" hspace="0" vspace="0" marginheight="0" marginwidth="0" scrolling="no" src="http://......."></iframe>'
else b[4]=''
b[5]='..'
.....
.....
b[36]='.... '
return;
}
begintag='<div style="font: normal 14px Arial; padding: 5px;">'; //set opening tag, such as font
declarations
fcontent[0]=b[0]+b[1]+b[2]+b[3]+b[4]+b[5];
fcontent[1]=b[6]+b[7]+b[8]+b[9]+b[10];
fcontent[2]=b[11]+b[12]+b[13]+b[14]+b[15];
fcontent[3]=b[16]+b[17]+b[18]+b[19]+b[20];
fcontent[4]=b[21]+b[22]+b[23]+b[24]+b[25];
fcontent[5]=b[26]+b[27]+b[28]+b[29]+b[30];
fcontent[6]=b[31]+b[32]+b[33]+b[34]+b[35];
fcontent[7]=b[0]+b[36];
closetag='</div>';
var ie4=document.all&&!document.getElementById;
var DOM2=document.getElementById;
var index=0;
//function to change content
function changecontent(){
if (index>=fcontent.length )
{ index=0; ++k;delay=delay+5000; }
go(k);
if(delay>15000){return;}
if (DOM2){
document.getElementById("fscroller").innerHTML=begintag+fcontent[index]+closetag
}
else if (ie4)
{
document.all.fscroller.innerHTML=begintag+fcontent[index]+closetag;
}
++index;
setTimeout("changecontent()", delay);
}
if (ie4||DOM2)
document.write('<div id="fscroller" style="width:700px;"></div>');
if (window.addEventListener)
window.addEventListener("load", changecontent, false)
else if (window.attachEvent)
window.attachEvent("onload", changecontent)
else if (document.getElementById)
window.onload=changecontent
</script>
</div>
</body>
here go(k); function might do this mass (output-->NaN). plz b a help... All, I have searched and experimented for quite some time to figure out how to read the return value from a function and have some sort of simple error that I suspect all of you will see immediately. I have tried to return a boolean, a string and a number to use a decision variable... Can one of you look at the code below and tell me what I am missing? (I am running this code a a workstation without any web server due to employer restrictions but I am having the same trouble on my development server ...) (I am trying to make a reusable function that will read the URL and let me know if it has a word in it so I can perform some logic.) Any help would be greatly appreciated... Thanks... <html> <head> <title> JS Test 1</title> <script type="text/javascript"> function OnBodyLoadLogic(){ // UrlHandler(); a test peice of code... UrlHandlerBoolean(); if (UrlHandlerBoolean() == true) { alert("This has the value some URL in the URL"); } else { alert("some is not in the URL"); } } function UrlHandler(){ var urlValue = (window.location.host); var urlValueLowerCase = urlValue.toLowerCase(); if (urlValueLowerCase.indexOf("some URL") != -1) { alert("This has the value some URL in the URL"); } else{ alert("some is not in the URL"); } } function UrlHandlerBoolean(){ var urlValue = (window.location.host); var urlValueLowerCase = urlValue.toLowerCase(); if (urlValueLowerCase.indexOf("some URL") != -1) { return true; } else{ return false; } } function load() { alert("Page is loaded"); } </script> </head> <body onload="OnBodyLoadLogic()"> <h3> JS Return Value</h3> <p> This the beginning of the Page. </p> <div> A Test Div <span id="ReturnValueDisplay" >Initial Value</span> </div> </body> </html> Please help, I have been looking at this all day and I know there must be a simple fix! How do I pass results back to textService so that I can make a call such as textResult = textService(text to pass in); I don't want to use a global variable if I can avoid it. This is the code Code: function textService(text){
req.open("GET", "http://....?text="+text, true);
req.onload = showResults;
req.send(null);
}
function showResults() {
results = req.responseXML.getElementsByTagName("Result");
}
Thank you in advance Hi, I am looking for some help with function below, the $date variable will for months 01-09 return a value of 1-9 leaving out the 0 numerator Code: function reformatDate($Date)
{
var $date = $Date;
months = ["01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"];
var parts = $date.split("/");
var m = parts[0];
for ( var i = 0; i < months.length; i++ ) {
if (months[i] == m ) {
var month = i;
}
}
$date = parts[2] + "-" + (month+1) + "-" + parts[1]; // +1 needs to be appended to month as JavaScript month starts at 0
_log("Date " + $date); //test date is in correct format
return $date;
}
so in above example if i pass a date 01/02/2015 it will return 2015-1-02 whereas i want it to return 2015-01-02 for the purposes of the function i need the $date to return 01,02,03 etc also can anyone explain why the zero is dropped before each number? Reply With Quote 01-22-2015, 03:39 PM #2 sunfighter View Profile View Forum Posts Senior Coder Join Date Jan 2011 Location Missouri Posts 4,830 Thanks 25 Thanked 672 Times in 671 Posts Problem is he Code: for ( var i = 0; i < months.length; i++ ) {
if (months[i] == m ) {
var month = i; // YOU SET THIS TO A SINGLE DIGIT. USE var month = months[i];
}
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