I am trying to get the text within the input tags to display the status of the radio button. The code works fine except for the very first time (the onload event). When the page loads the first alert is displayed but not the second. Once I click on the other radio button (the unchecked one) and then back to the original one, I see both alerts. Can someone please help me with why this is happening? I am sure it is something stupid. Thanks
<script>
window.onload = autoSelect("rolls");
function autoSelect(theValue)
{
if(theValue=="rolls")
{
alert("hello world");
document.getElementById("theLabel").innerHTML=theValue;
alert("hello World");
}
else
{
document.getElementById("theLabel").innerHTML=theValue;
}
}
</script>
<div >
<form action="" >
<input type="radio" id="matRadioRolls" name="rollsOrSqFeet" value="rolls" onclick="autoSelect(this.value)" checked>Rolls<br/>
<input type="radio" id="matRadioSqFt" name="rollsOrSqFeet" value="sqfeet" onclick="autoSelect(this.value)" >Sq Ft<br/>
</form>
<label class="productsLabel" for=rolls" id="theLabel"></label>
<input type="text" name="rolls" id="rollsMat"></button>
</div>
You're actually executing your function call before the window object has fully loaded. You should change the call to this:
window.onload = function(){autoSelect("rolls");}
jsFiddle example
Oh, and a small side note. You have a typo in for=rolls" (missing a set of quotes).
Just guessing here: Depends on what browser you are using. there is a chance that the browser supresses the second alert (because you clicked don't show again)
Generally: Use console.log over alert. Use the Dev Tools.
Related
I want to file load popup to appear after I use function loadFile(), because myInput is hidden.
//HTML
<div id ="hideWhiteSpace" style="display:none">
<input id="myInput" type="file"/>
</div>
Here is my javascript file example, onchange won't work cause i cant press the button.
//JS
function loadFile(){
document.getElementById('myInput').onchange = function (e){
//run code to load file into web.
}
}
Okay, I got it, just put this before onchange line:
document.getElementById('myInput').click();
I don't know if I should answer my own questions or delete the post if I got the answer.
Comment please.
I have a weird problem when I try to submit a form. My page contains a html table and one column has a link that deletes the line from the DB calling a js function.
The html/php line is the following one:
<input type="hidden" name="deleteid" value=0>
print ", delete";
The javascript function is the following one:
function delete_line(team_id) {
if (confirm('<?php echo $txt_confirm_del_team;?>')){
document.formName.elements.deleteid.value = team_id;
document.formName.submit();
}
}
If I put a breakpoint on the line "document.formName.submit();", the called page can read the parameter "deletedid". If not, the parameters are not passed to the page called by the submit.
Btw, I have another issue if I use getElementById() to retrieve the element or the form in the javascript function: it says the getelementbyid is null (and it's not because I can retreive it using the syntax document.formName.elements.deleteid)
thanks
There may be some other event handlers there, you can open the page in Chrome and right click the anchor, then choose "inspect element" and then check out the event handlers in the "event listeners" tab.
As far as the code you posted; there is nothing wrong with it. The following works just fine for me:
<html>
<head>
<title>test</title>
</head>
<body>
<a onclick="javascript:delete_line(22);">delete</a>
<script>
function delete_line(nr){
console.log(nr);
}
</script>
</body>
</html>
Really unsure about the title question. Feel free to suggest. :)
Hi guys! I created a very simple code, that would represent my web.
Here is my home page:
<html>
<script type="text/javascript">
function getPage(linkPage,variables,divName){
$.get(linkPage + "?" + variables,function(data){$(divName).html(data);});
}
function show(){
//functionName("path","data","idName");
getPage("AjaxPages/hi.php","","#container");
}
</script>
<body>
<div id="container">
First Name<input type="text" />
<input type="button" value="next" onClick="show();"/>
</div>
</body>
</html>
Basically, it ask for information, Name for example. When the button NEXT is click it will call a javascript function that will call a certain page or the NEXT PAGE that will load on the div with the Id Container.
NEXT PAGE
On the next page, it will then ask another question, like Last Name for example. But then, I want to go back to the previous page to make same changes.
HERE is the code:
<script type="text/javascript">
function show(){
ajaxgetdata("index.php","","#container1");
}
</script>
<div id="container">
Last Name<input type="text" />
what to make changes on the previous page?<input type="button" value="back" onClick="show();"/>
</div>
When button back is clicked, it will just call the previous page, but will not include the text that you input on the textbox.
I know that it happens because it just call the page..
Is there a way? that when back button is clicked, it will reload the previous page, with all the contents/inputs.
:) :( :'( :/ :|
Don't load any additional pages. Do everything with AJAX.
If you don't want, some server-side script may help :D
If you can use HTML5 in your site, you can take a look at the History API which can handle navigation and fires a "popstate" event, to which you can pass data.
There's a good example here:
http://diveintohtml5.info/history.html
You could do something like this:
window.addEventListener("popstate", function(e) {
if(!e.state || !e.state.firstName) {
return;
}
document.getElementById('firstName').value = e.state.firstName;
});
That even will trigger everytime you go back or forward, and you could just organize some function or array with the information you need.
Hope it helps.
In Chrome and IE, the following code, when the Anchor tag is clicked, pops up the form (modal box ID of "modalContent", form ID of "DL") and adds an "OnSubmit" to the Form. When the Form is submitted, it will navigate to the requested PDF via Javascript, and run some ASP to send an email with their details attached.
<script language="javascript">
function downloadAnyway(link) {
$('#DL')[0].setAttribute('ONSUBMIT', 'return checkform("' + link + '")');
$('#modalContent').modal();
}
function checkform(navName) {
window.open(navName);
$.modal.close();
}
</script>
<!-- link to download a product guide -->
Product Guide
<div id="modalContent">
<form id="DL" action="contactusprocessNew2.asp" method="post" name="contact" >
<div align="center">
<input type="image" src="templates/default/images/submit_download.gif" class="imagebutton" value="submit" />
</div>
</form>
</div>
This works fine in IE and Chrome, in Firefox, the Javascript onsubmit works, but the action of the asp never fires. If I remove the javascript, the asp fires as expected.
So, the final form in FireFox, after the "onsubmit" has been dynamically added looks as below:
<form id="DL" action="contactusprocessNew2.asp" method="post" name="contact" onsubmit="return checkform("downloads/ProductGuide.pdf")">
The onsubmit fires, opening the product guide in another tab, however, the ASP Action never fires. There is more that goes on here, like we write a cookie making sure we don't ask the client for a download every time they use our downloads, however, I've trimmed off anything I think is outside the problem domain.
In the asp, I have gotten rid of all code and put a simple response.redirect to see if it fires and make sure nothing is going on in the ASP.
Any idea how I can get this to function in FireFox?
UPDATE:
I have replaced the onsubmit event wireup with a 'proper' jquery submit wireup replacing the first line below, with the second. The asp on the form still does not function.
//$('#DL')[0].setAttribute('ONSUBMIT', 'return checkform(\'' + link + '\')');
$('#DL').submit(function checkform() {
$.modal.close();
window.open(link);
return true;
});
UPDATE 2
Right, it is because to modal popup CLOSES before the ASP fires. If we comment out the line $.modal.close(); then the asp fires as expected. In Chrome and IE the javascript and the ASP must fire at the same time, in Firefox, the javascript fires which "hides" the div with the "modelContent" and the asp can no longer fire. So this is the real problem... now how to sort it out...
<form id="search" action="/search" method="get" autocomplete="off">
<div>
<input type="button" name="test_button" value="test" />
</div>
</form>
<script>
document.getElementById("test_button").value = "changed_test"
</script>
Just as the HTML code above shows, I have defined a button with name test_button and value test and changing its value with the code in the script tag.
Now I am debugging a large webpage which is using a mechanism like this using Firebug and Firefox in Linux.
I want to know how I can find the script that changes the value attribute of the <input ... />, but the web page is too large, various <script> and anonymous functions which are auto-executed made it nearly impossible to find the specific script manually.
Since I am in Linux, I cannot use any Microsoft tools to search the whole web page. I only have Firebug and Chrome. Can Firebug realize that? Does anyone have a good idea of how to find the specific <script> that changed the value?
Add some code like this to the document, right after the form with the button:
<script>
var node = document.getElementById("test_button");
Object.defineProperty(node, 'value', {
set: function() { throw new Error('button value modified'); }
});
</script>
This will throw an error when anything tries to modify the button's value.
Expand the error and click the last line number shown. This will take you straight to the line that set the value of the button.
Here's a demo: http://jsfiddle.net/XSJZN/
Tested in Chrome 17.