I have number of checkboxes and another checkbox for "Select All"
I want to check if the user has selected at least one checkbox. Need modification in javascript
<script language="Javascript">
function doSubmit(){
function check_checkboxes()
{
checked=false;
var c = document.getElementsByTagName('INPUT');
for (var i = 1; i < c.length; i++)
{
if (c[i].type == 'checkbox')
{
if (c[i].checked) {
return true}
else {alert("Please identify what warehouses comply:"); }
}
} //if I place my struts action here..its not working?
}
document.holiDay.command.value= 'addingApp'; //My Struts action if something checked.
document.holiDay.submit();
}
var all=document.getElementById('holiDay');
In HTML IDs should be unique, so getElementById will only return 1 element. Perhaps you could try getElementsByTagName - http://msdn.microsoft.com/en-us/library/ms536439(VS.85).aspx ?
Something like...
function check_checkboxes()
{
var c = document.getElementsByTagName('input');
for (var i = 0; i < c.length; i++)
{
if (c[i].type == 'checkbox')
{
if (c[i].checked) {return true}
}
}
return false;
}
and change your Validate function to...
function Validate()
{
if(!check_checkboxes())
{
alert("Please identify what warehouses comply:");
return false;
}
return true;
}
Select at least one check box using jqQery. Try the following code.
$('input[type="checkbox"][name="class"]').on('change', function () {
var getArrVal = $('input[type="checkbox"][name="class"]:checked').map(function () {
return this.value;
}).toArray();
if (getArrVal.length) {
//execute the code
} else {
$(this).prop("checked", true);
alert("Select at least one column");
return false;
}
;
});
(function() {
for(x in $ = document.getElementsByTagName("input"))
with($[x])
return (type == "checkbox" ? checked == true : 0)
})
Related
I think so there is a problem with for statement??
Adjusted code again, but not alert popup is all the time even if all the input fields got values?
Hello I am trying to validate a dynamic array of fields on a form:
<form onsubmit="return checkReq();">
<input value="" type="hidden" name="slider[]" id=""/>
</form>
with the following JavaScript, but it doesn't work? Could you tell me please what I am doing wrong.
<script language="javascript">
function checkReq () {
var boxes = document.getElementsByName("slider[]");
var ret = true;
for (var x = 0; x < boxes.length; x++) {
if(boxes[x].value == '' || '0'){
ret = false;
break;
} else {ret = true;}
}
if (ret == false)
{
alert('Problem'); return ret;
}
}
</script>
I think this might help.
function checkReq () {
var boxes = document.getElementsByName("slider[]");
var ret = true;
for (var x = 0; x < boxes.length; x++) {
if(boxes[x].value == '' || boxes[x].value == '0'){
ret = false;
break;
} else {ret = true;}
}
if (ret == false)
{
alert('Problem'); return ret;
}
}
You always return after the first loop, so it doesn't go through each element (and thus redundant), is this intended?
Try this
You are trying to compare element instead of it's value JSFIDDLE
function checkReq () {
var boxes = document.getElementsByName("slider[]");
for (var x = 0; x < boxes.length; x++) {
if(boxes[x].value == '' || boxes[x].value == '0'){
alert('Problem'); return false;
}
else {return true;}
}
}
I want to do form.submit() but only if all form items with the required attribute are full.
I was thinking on simpy iterating through the form children in search for the attribute, but I'm not sure how to do it since there might be nested elements and such. And probably there is an easier way to do it.
this.form_is_full = function(form){
for (var i = 0; i < form.elements.length; i++){
if(form.elements[i].getAttribute("required") && form.elements[i].value=="")
{
// If has attribute required and is blank return false
}
}
return true;
}
How can I do this?
function Validate()
{
// create array containing textbox elements
//for example:
var inputs = [document.getElementById('fname'),
document.getElementById('lname'), document.getElementById('email'),
document.getElementById('messagetxt')];
var error;
for(var i = 0; i<inputs.length; i++)
// loop through each element to see if value is empty
{
if(inputs[i].value == '')
{
error = 'Please complete all fields.';
alert(error);
return false;
}
}
}
Try this:
$('#YourFormId').submit(function(e) {
if ($.trim($("#YourFormId input").val()) === "") {
e.preventDefault();
alert('you did not fill out one of the fields');
}
});
This is what I did:
this.validate_form = function(form){
for (var i = 0; i < form.elements.length; i++){
if(form.elements[i].value == "" && form.elements[i].getAttribute("name") && form.elements[i].hasAttribute("required"))
{
return false;
}
}
return true;
}
I trying to do some validation on a form with radio buttons in it. I can get the text elements to work fine but the radio buttons don't seem to like me.
function validateAll(theForm)
{
var err=0;
var fields;
for (var i=0; i<theForm.elements.length; i++)
{
fields =theForm.elements[i];
if(fields.type == "text" || fields.type == "textarea")
{
if(fields.value == "" || fields.value == null){
err++;
validateText(fields.id);
}
}
else if(fields.type == "radio"){
validateRadio(fields)
}
}
if(err > 0){return;}else{document.myform.submit();}
}
function validateText(id)
{
var x=document.forms["myForm"][id].value;
if (x==null || x=="")
{
var text = id+"Text";
document.getElementById(text).style.visibility ="visible";
return;
}else {
var text = id+"Text";
document.getElementById(text).style.visibility="hidden";
return;
}
}
function validateRadio(radios)
{
var id = radios.id;
var text;
for (i = -1; i < radios.length; ++i)
{
if (radios[i].checked) {
text = id+"Text";
document.getElementById(text).style.visibility="hidden";
return true
}}
text = id+"Text";
alert(text);
document.getElementById(text).style.visibility ="visible";
return false;
}
I am just calling it with a input button. Any ideas on why its not working? It turns the text on find but dose not turn it off.
I am using following code to detect whether the check box inside my gridview template field is checked or not. If none of the check box is selected then I want to show alert message.
function findCheckBox() {
var inputElements = document.getElementsByTagName('input');
var chekSelect = false;
for (var i = 0; i < inputElements.length; i++) {
var myElement = inputElements[i];
if (myElement.type === "checkbox") {
if (myElement.checked === false) {
chekSelect = true;
return true;
}
}
if (chekSelect === true) {
return true;
}
else {
alert('Please Check Atleast one record to print cheque!!!');
return false;
}
}
}
But with this code when I click on my button its showing me error message for one time even if one or more check box is checked. What I am doing wrong here. Can anyone help me please.
Your logic is slightly off. Corrected version:
jsFiddle demo
function findCheckBox() {
var inputElements = document.getElementsByTagName('input');
var chekSelect = false;
for (var i = 0; i < inputElements.length; i++) {
var myElement = inputElements[i];
if (myElement.type === "checkbox") {
if (myElement.checked) {
chekSelect = true;
break;
}
}
}
if(!chekSelect) {
alert('Please Check Atleast one record to print cheque!!!');
return false;
} else {
return true;
}
}
I've changed the .checked test, to test for it being true not false, because you want to know if at least one checkbox is checked. I also added a break, and moved the alert to outside of the for, because you won't know if there is a checkbox checked until the for completes.
Try this
function findCheckBox() {
var inputElements = document.getElementsByTagName('input');
for (var i = 0; i < inputElements.length; i++) {
var myElement = inputElements[i];
if (myElement.type === "checkbox" && myElement.checked) {
return true;
}
}
alert('Please Check Atleast one record to print cheque!!!');
return false;
}
Using JQuery:
var checked = false;
$('input:checkbox').each(function(){
if($(this).prop('checked')){
checked = true;
break;
}
});
if(!checked) alert('Please Check At least one record to print cheque!!!')
What would I need to add in order for this to validate according to how many checkboxes have been selected? I want the user to select at least two checkboxes before submission of data. Here is my Javascript code:
<script type="text/javascript" language="JavaScript">
function checkCheckBoxes(theForm) {
if (
theForm.Conservatives.checked == false &&
theForm.Labour.checked == false &&
theForm.LiberalDemocrats.checked == false)
{
alert ('Choose At Least Two Parties Who Will Be Standing For This Election');
return false;
} else {
return true;
}
}
</script>
The current Javascript code only validates if any checkboxes have been selected or not, but I want it to validate for two checkboxes.
Just count how many are checked and see if it's less than 2.
function checkCheckBoxes(theForm) {
var cnt = 0;
if (theForm.Conservatives.checked) ++cnt;
if (theForm.Labour.checked) ++cnt;
if (theForm.LiberalDemocrats.checked) ++cnt;
if (cnt < 2) {
alert ('Choose At Least Two Parties Who Will Be Standing For This Election');
return false;
} else {
return true;
}
}
As long as you're only worried about those three checkboxes and you don't want to use a JavaScript library, the easiest thing I can think of would be:
var checkedBoxes = [];
if(theForm.Conservatives.checked)
checkedBoxes.push(theForm.Conservatives);
if(theForm.Labour.checked)
checkedBoxes.push(theForm.Labour);
if(theForm.LiberalDemocrats.checked)
checkedBoxes.push(theForm.LiberalDemocrats;
// two or more boxes are checked
if(checkedBoxes.length < 2){
alert('Choose at least two parties.');
}
else {
// Do stuff with checkedBoxes.
}
This method will not only give you the Count of the number of checked items but will also allow you to access only the checked boxes later in your code if needed.
You can do:
if (theForm.Conservatives.checked +
theForm.Labour.checked +
theForm.LiberalDemocrats.checked) < 2)
{
alert ('Choose At Least Two Parties Who Will Be Standing For This Election');
return false;
} else {
return true;
}
function checkCheckBoxes(theForm) {
var opts = ["Conservatives","Labour","LiberalDemocrats"],
selected = 0;
for (var i = 0; i < opts.length; i++) {
if (theForm[opts[i]].checked)
selected++;
}
if (selected < 2) {
alert ('Choose At Least Two Parties Who Will Be Standing For This Election');
return false;
} else {
return true;
}
}
function checkCheckBoxes(theForm) {
if(theForm.Conservatives.checked + theForm.Labour.checked + theForm.LiberalDemocrats.checked > 1)return true;
alert ('Choose At Least Two Parties Who Will Be Standing For This Election');
return false;
}
function checkCheckBoxes(theForm) {
var checkboxes = [theForm.Conservatives, theForm.Labour, theForm.LiberalDemocrats];
var checked = 0;
checkboxes.forEach(function(el){
if (el.checked) checked++;
});
if (checked < 2)
{
alert ('Choose At Least Two Parties Who Will Be Standing For This Election');
return false;
} else {
return true;
}
}