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JavaScript - Checkboxes - Run Different Code On Uncheck
Hello,
I have a simple script that counts the number of check boxes that are checked and then when reaches a certain number displays an alert. It is triggered by the onclick event. My question is, by keeping with the onclick event how do I make JS run something different when a box is unchecked. So bottom line - if it is checked the counter goes up...if it is unchecked the counter goes down all being triggered by the onclick event - is this possible. Below is the code I have been working with. The only part that is working is the middle if statement - the part where it is checking to see if the counter is equal to 6 Code: // JavaScript Document
var count = 0
function checkedcount(which) {
if (which.checked = true;)
{count = count + 1}
if (count == 6)
{ alert('Only pick 5');
count = count - 1;
which.checked = false;
}
if (which.checked = false;)
{count = count - 1}
}
Similar TutorialsIs it possible to use Javascript to uncheck all checkboxes that appear within a specific div? I'm already using names/ids for each checkbox, and these are generated dynamically, so I cant really apply a group to all the checkboxes I want to untick. I am using some code in a form to show an image if a checkbox is selected. A different image is shown for each checkbox. The code works well, but I need some help to update the code so that only one of the four checkboxes can be selected at any one time. If one is checked and the user selects a different one, the original one should automatically untick and the associated image should change as well. To summarise, I want only one image and one checkbox to show at any one time (and it needs to be cross browser please). Here is the code : <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Untitled Document</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <script language="JavaScript"> <!-- function toggle(target) { obj=(document.all)? document.all[target] : document.getElementById(target); obj.style.display=(obj.style.display=='none')? 'inline' : 'none'; } //--> </script> </head> <body> <form> Selection 1 <input type="checkbox" name="headerlink" id="headerlink" value="1" style="border: none; vertical-align: middle;" onClick="toggle('header')" /><br> Selection 2 <input type="checkbox" name="headerlink" id="headerlink" value="1" style="border: none; vertical-align: middle;" onClick="toggle('header1')" /><br> Selection 3 <input type="checkbox" name="headerlink" id="headerlink" value="1" style="border: none; vertical-align: middle;" onClick="toggle('header2')" /><br> Selection 4 <input type="checkbox" name="headerlink" id="headerlink" value="1" style="border: none; vertical-align: middle;" onClick="toggle('header3')" /><br> </form> <img src="logo.jpg" border="0" alt="" id="header" style="display:none;" /> <img src="logo2.jpg" border="0" alt="" id="header1" style="display:none;" /> <img src="logo3.jpg" border="0" alt="" id="header2" style="display:none;" /> <img src="logo4.jpg" border="0" alt="" id="header3" style="display:none;" /> </body> </html> I'm trying to write some code that uses buttons to check and uncheck certain checkboxes. I am stumped and all the code I have been finding is using for loops to check or uncheck all the boxes, when I just want to check or uncheck certain ones. Here's an example of the type of function I'm trying to use: Code: function checkSome (form) {
document.myForm.list.one.checked = true;
document.myForm.list.two.checked = true;
document.myForm.list.three.checked = false;
}
And the button: Code: <input type="button" value="Option 1" onClick="checkSome(this.form)"/> Whats up guys, have an interesting one for you... So I have a pretty simple survey form, with 5 checkbox answers, one of them being "None of the Above". All 5 are part of the same question1[] array. My goal is to have a function that unchecks the other 4 boxes when None of the Above is checked. The problem is that since None of the Above is part of the question1 array, it unchecks itself. So how do I separate this None of the Above option? After all, it is still a valid answer to question 1, so I don't want it to sit in a different array just because... Here's what I have now: Java: Code: function SetValues(Form, CheckBox, Value)
{
var objCheckBoxes = document.forms[Form].elements[CheckBox];
var countCheckBoxes = objCheckBoxes.length;
for(var i = 0; i < countCheckBoxes; i++)
objCheckBoxes[i].checked = Value;
}
html: Code: <input id="question1" name="question1[]" type="checkbox" value="Answer 1"> 1<br>
<input id="question1" name="question1[]" type="checkbox" value="Answer 2"> 2<br>
<input id="question1" name="question1[]" type="checkbox" value="Answer 3"> 3<br>
<input id="question1" name="question1[]" type="checkbox" value="Answer 4"> 4<br>
<input id="question1" name="question1[]" type="checkbox" value="None of the above" onclick="SetValues('form1', 'question1[]', false);"> None of the above <br>
So again the issue with this code is that since None of the Above is inside the question1 array, it unchecks itself as well. thanks, rg this is my js for all checkbox to be check and uncheck all the item. when i have several item to be checked, it successfully check all with the function. but the problem is when i have only 1 item in the list to be checked. it will not check all or uncheck all when i click the check all function. pls advice. Code: <script language="JavaScript">
<!--
<!-- Begin
function CheckAll(chk)
{
for (i = 0; i < chk.length; i++)
chk[i].checked = 1 ;
}
function UnCheckAll(chk)
{
for (i = 0; i < chk.length; i++)
chk[i].checked = 0 ;
}
// End -->
</script>
how to copy some text to the clipboard with jquery or javascript, from google. i know there is a pludgin named zeroclipboard http://code.google.com/p/zeroclipboard/ can do this with cross browers. when i tested it on my site. i set it to copy text optionally . it can't work. my test link is http://xanlz.com/copy/1.html it always copys all the values. even i uncheck some check box. may be the value doesn't be changed. but when i alter() the variable, the value is ok. how to correct it? thank you. i want it can copy the checked box value. if the box unchecked, then don't copy its value. I have the following page www.crownvalleywinery.com/kiosk/default.html and I would like to add a button or checkbox to check/uncheck all. Note we are already using some javascript for custom checkboxes so it needs to integrate with that. Any help is appreciated. Here is the current javascript... Code: /*
CUSTOM FORM ELEMENTS
Created by Ryan Fait
www.ryanfait.com
The only thing you need to change in this file is the following
variables: checkboxHeight, radioHeight and selectWidth.
Replace the first two numbers with the height of the checkbox and
radio button. The actual height of both the checkbox and radio
images should be 4 times the height of these two variables. The
selectWidth value should be the width of your select list image.
You may need to adjust your images a bit if there is a slight
vertical movement during the different stages of the button
activation.
Visit http://ryanfait.com/ for more information.
*/
var checkboxHeight = "47";
var radioHeight = "25";
var selectWidth = "190";
/* No need to change anything after this */
document.write('<style type="text/css">input.styled { display: none; } select.styled { position: relative; width: ' + selectWidth + 'px; opacity: 0; filter: alpha(opacity=0); z-index: 5; }</style>');
var Custom = {
init: function() {
var inputs = document.getElementsByTagName("input"), span = Array(), textnode, option, active;
for(a = 0; a < inputs.length; a++) {
if((inputs[a].type == "checkbox" || inputs[a].type == "radio") && inputs[a].className == "styled") {
span[a] = document.createElement("span");
span[a].className = inputs[a].type;
if(inputs[a].checked == true) {
if(inputs[a].type == "checkbox") {
position = "0 -" + (checkboxHeight*2) + "px";
span[a].style.backgroundPosition = position;
} else {
position = "0 -" + (radioHeight*2) + "px";
span[a].style.backgroundPosition = position;
}
}
inputs[a].parentNode.insertBefore(span[a], inputs[a]);
inputs[a].onchange = Custom.clear;
span[a].onmousedown = Custom.pushed;
span[a].onmouseup = Custom.check;
document.onmouseup = Custom.clear;
}
}
inputs = document.getElementsByTagName("select");
for(a = 0; a < inputs.length; a++) {
if(inputs[a].className == "styled") {
option = inputs[a].getElementsByTagName("option");
active = option[0].childNodes[0].nodeValue;
textnode = document.createTextNode(active);
for(b = 0; b < option.length; b++) {
if(option[b].selected == true) {
textnode = document.createTextNode(option[b].childNodes[0].nodeValue);
}
}
span[a] = document.createElement("span");
span[a].className = "select";
span[a].id = "select" + inputs[a].name;
span[a].appendChild(textnode);
inputs[a].parentNode.insertBefore(span[a], inputs[a]);
inputs[a].onchange = Custom.choose;
}
}
},
pushed: function() {
element = this.nextSibling;
if(element.checked == true && element.type == "checkbox") {
this.style.backgroundPosition = "0 -" + checkboxHeight*3 + "px";
} else if(element.checked == true && element.type == "radio") {
this.style.backgroundPosition = "0 -" + radioHeight*3 + "px";
} else if(element.checked != true && element.type == "checkbox") {
this.style.backgroundPosition = "0 -" + checkboxHeight + "px";
} else {
this.style.backgroundPosition = "0 -" + radioHeight + "px";
}
},
check: function() {
element = this.nextSibling;
if(element.checked == true && element.type == "checkbox") {
this.style.backgroundPosition = "0 0";
element.checked = false;
} else {
if(element.type == "checkbox") {
this.style.backgroundPosition = "0 -" + checkboxHeight*2 + "px";
} else {
this.style.backgroundPosition = "0 -" + radioHeight*2 + "px";
group = this.nextSibling.name;
inputs = document.getElementsByTagName("input");
for(a = 0; a < inputs.length; a++) {
if(inputs[a].name == group && inputs[a] != this.nextSibling) {
inputs[a].previousSibling.style.backgroundPosition = "0 0";
}
}
}
element.checked = true;
}
},
clear: function() {
inputs = document.getElementsByTagName("input");
for(var b = 0; b < inputs.length; b++) {
if(inputs[b].type == "checkbox" && inputs[b].checked == true && inputs[b].className == "styled") {
inputs[b].previousSibling.style.backgroundPosition = "0 -" + checkboxHeight*2 + "px";
} else if(inputs[b].type == "checkbox" && inputs[b].className == "styled") {
inputs[b].previousSibling.style.backgroundPosition = "0 0";
} else if(inputs[b].type == "radio" && inputs[b].checked == true && inputs[b].className == "styled") {
inputs[b].previousSibling.style.backgroundPosition = "0 -" + radioHeight*2 + "px";
} else if(inputs[b].type == "radio" && inputs[b].className == "styled") {
inputs[b].previousSibling.style.backgroundPosition = "0 0";
}
}
},
choose: function() {
option = this.getElementsByTagName("option");
for(d = 0; d < option.length; d++) {
if(option[d].selected == true) {
document.getElementById("select" + this.name).childNodes[0].nodeValue = option[d].childNodes[0].nodeValue;
}
}
}
}
window.onload = Custom.init;
Hi all. I have the following problem that I require a pointer with. I have a php variable named "$seatid" This could contain 1 or many entries. I have a page full of checkboxes named A1-8, B1-8, C1-8 etc to P1-8 I want a way of greying out the checkboxes on the page that relate to the values that are contained in the php variable. So they cannot be clicked. It would also like to change the colour of the cell that the check box is contained in. It is important that the checkboxes or at least the table that contain the checkboxes remain, as it represents the layout of a theatre. Cheers for your help All, I have the following code which validates a form has at least one checkbox checked before it submits it. However I want to make sure that there aren't more then 25 checked on the page. How can I do this? Code: function validate(field)
{
for (var i = 0; i < field.length; i++){
if(field[i].checked){ // if a field is checked form is submitted
return true;
}
}
alert("You need to have a check box selected to submit the form!");
return false; // if no fields are checked form not submitted
}
Thanks in advance! My form generates 1 to n records which contains check boxes. Based on some condition if I click a check box it has to check & disable some other check boxes automatically. I did it. But, at the same time if I un-check I have to un-check all the check boxes which were checked. Please let me know. Thanks a lot.
Good evening all, I have a bit of an issue with checkboxes - basically I need to allow only 1 selection and then have a comments box show when a checkbox is checked. I've gotten the comments box to show when the checkbox is checked but I can't seem to workout how to allow only one. I'd really like the user to be able to change their mind and make a different selection but only have 1 be selected at a time (sort of like radio buttons work). I know it would be much easier and probably better to use radio buttons but that isn't an option with this. (The actual HTML is produced using a style sheet in an application that I am interfacing with so all I can do is use the checkbox.) Here is the code I am using to show or hide the comments box. Code:
function HideComments()
{
var a1 = document.getElementById("crmForm_answer1").checked;
var a8 = document.getElementById("crmForm_answer8").checked;
var a2 = document.getElementById("crmForm_answer2").checked;
var a3 = document.getElementById("crmForm_answer3").checked;
var a4 = document.getElementById("crmForm_answer4").checked;
var a5 = document.getElementById("crmForm_answer5").checked;
var a6 = document.getElementById("crmForm_answer6").checked;
var a7 = document.getElementById("crmForm_answer7").checked;
var a9 = document.getElementById("crmForm_answer9").checked;
var a10 = document.getElementById("crmForm_answer10").checked;
if(a1==true)
{
document.getElementById("crmForm_answer1_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer1_value").parentNode.parentNode.style.display = 'none';
if(a8==true)
{
document.getElementById("crmForm_answer8_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer8_value").parentNode.parentNode.style.display = 'none';
if(a2==true)
{
document.getElementById("crmForm_answer2_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer2_value").parentNode.parentNode.style.display = 'none';
if(a3==true)
{
document.getElementById("crmForm_answer3_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer3_value").parentNode.parentNode.style.display = 'none';
if(a4==true)
{
document.getElementById("crmForm_answer4_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer4_value").parentNode.parentNode.style.display = 'none';
if(a5==true)
{
document.getElementById("crmForm_answer5_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer5_value").parentNode.parentNode.style.display = 'none';
if(a6==true)
{
document.getElementById("crmForm_answer6_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer6_value").parentNode.parentNode.style.display = 'none';
if(a7==true)
{
document.getElementById("crmForm_answer7_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer7_value").parentNode.parentNode.style.display = 'none';
if(a9==true)
{
document.getElementById("crmForm_answer9_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer9_value").parentNode.parentNode.style.display = 'none';
if(a10==true)
{
document.getElementById("crmForm_answer10_value").parentNode.parentNode.style.display = 'block';
}
else
document.getElementById("crmForm_answer10_value").parentNode.parentNode.style.display = 'none';
}
Thanks in Advance Sam have a simple calculator i made with checkboxes and some Js. the problem is that it does not work in FF. any idea how this can work for IE Safari AND FF Code:
function getPrice(amount, boxName){
total = eval() ;
checked = document.getElementById(boxName).checked
if (checked){
total = parseFloat(form1.Total2.value) + parseFloat(amount);
}else{
total = parseFloat(form1.Total2.value) - parseFloat(amount);
}
total.toFixed(2);
form1.Total2.value = total
document.getElementById("total").innerHTML = "Total $"+total;
}
from a browser address bar command? say if a page has hundreds of checkboxes, and I needed to check them all, but only 2-3 should be left out, how do i input a browser command line, to check it all, so i will manually uncheck the 2 or 3 thats not needed?
Hello, today I am trying to allow a user to easily uncheck/check all checkboxes in a form by checking or unchecking a checkbox. The checkboxes would be in a form like so: Code: <form action="" method="post"> <input type="checkbox" name="checked[]" value="1"> <input type="checkbox" name="checked[]" value="2"> <input type="checkbox" name="checked[]" value="3"> <input type="checkbox" name="checked[]" value="4"> </form> I use an event handler to call a function: Code: <input type="checkbox" name="checkall" onchange="checkall('checked[]', this.checked)">
And here is the function: Code: function checkall(box_name, current_state) {
all = document.getElementsByName(box_name);
action = (current_state == "checked") ? "false" : "true";
for (i = 0; i < all.length; i++) {
all[i].checked=action;
}
}
The event handler should pass the name of the checkboxes and whether the "check all" checkbox is currently checked or not to the checkall() function. Nothing happens when I check/uncheck the "check all" function. Help? Hi all, I have a form with a number of checkboxes. The 1st one is "Select All". When this checkbox is ticked I would like to disable all others. When the "Select All" checkbox is unticked, all checkboxes should be enabled. Can anyone tell me how to do this? is JQuery the preferred method these days? Thanks in advance This script works via "elem.checked" which is great for checkboxes (see http://javascript.internet.com/forms...heckboxes.html), but I need it to work with image buttons instead where there is no "checking" going on. Is this possible? I tried elem.onclick and elem.clicked but neither works. I don't know enough about onclick conditionals. Please help. Code: function UpdateCost() {
var sum = 0;
var gn, elem;
for (i=0; i<4; i++) {
gn = 'game'+i;
elem = document.getElementById(gn);
if (elem.checked == true) { sum += Number(elem.value); }
}
document.getElementById('totalcost').value = sum.toFixed(2);
}
tl;dr: Want to make the above work with <a onclick="UpdateCost()"><img></a>, not <input type="checkbox" onclick="UpdateCost()"> Hi, I have a few checkboxes in a form. Some of them work independently, but some make the others go on and off. Specifically the lower ones are controlling the upper ones. Can anyone explain why please? Code: <td> <input type="checkbox" name="weddingitem1" value="Toppers" id="Toppers"/><label for="Toppers" >Toppers<br /> <input type="checkbox" name="weddingitem2" value="Champers" id="Champers"/><label for="Champers" >Champers<br /> </td> I have a group of checkboxes named "list[]". I want to validate that at least one is checked. How can I do this?
i'm using http://www.javascript-coder.com/html...lidation.phtml now I want to know how to validate a checkbox if i have <input type=checkbox id="c2" name=33>dd <input type=checkbox id="c2" name=33>ff.aa <input type=checkbox id="c2" name=33>ddd is it correct to have them all with the same id and how do I validate it using this validation routine? (or if this one doesn't work is there a specific validation functions -your can recommend that are easy to use for all different types of input) Hello, I have a form generated by mySQL and PHP, and inside the form (named 'UpdateDB') each line has checkboxes, like so: Code: <input type="checkbox" name="checkbox[]" value="96" onclick="highlight(this,'check_96')"> The onclick is to highlight the row, that works fine. However, I wrote a javascript function that toggles the select all the checkboxes or none. This is done by an image: Code: <img src="img/select.png" align="top">
<a href="#" onClick="togBox('updateDB');"><img src="img/all.png" name="listToggle" align="top"></a>
Easy, right? So heres the Javascript function that the above image (the 'none' part) links to: Code: function togBox(form)
{ var myForm = document.forms[form];
document.listToggle.src=='http://gospeltruth.tv/admin/img/all.png' ? toggle = true : toggle = false;
(toggle) ? document.listToggle.src='img/none.png' : document.listToggle.src='img/all.png';
for( var i=0; i < myForm.length; i++ )
{
(toggle) ? myForm.elements[i].checked = 'checked' : myForm.elements[i].checked = '';
}
}
Its a brilliant function if I do say so myself, and this is what I dont get: two days ago, it was working fine, today, its not working at all. The image changes, but IE flags up the 'myForm.length' as an error. How was it working 2 days ago and not today, when I havent touched it? Can anybody advise why its not currently working? Thanks for your help, ~Chud37 |
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