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JavaScript - Hide Or Display Form Field When Page Loaded
I have a form with three fields. When the user changes the value of field1, the form displays either field2 or field3. This works fine for NEW records.
However, I'm running into a problem when trying to EDIT an existing record. When the form is loaded, I need to test the value of field1 and display either field2 or field3. I've tried using the form onload event, but do not know how to access the value of field1. I'm using Javascript and div tags. This is what I have so far. <script type="text/javascript"> function hide(obj) obj1 = document.getElementById(obj); obj1.style.display = 'none'; } function show(obj) { obj1 = document.getElementById(obj); obj1.style.display = 'block'; } function show_other(optionValue) { if(optionValue=='C') { show('divClass');} else{hide('divClass'); } if(optionValue=='W') { show('divWorkshop');} else{hide('divWorkshop'); } } </script> /* Field1 - is a drop down list */ <select name="ClassType" size="1" onchange="show_other(this.value)"> ... </select> /* Field2 */ <div id="divClass"> ... </div> /* Field 3 */ <div id="divWorkshop"> ... </div> Appreciate any assistance. Thanks Peter Similar TutorialsI want to have several forms on one page that are not displayed until a selection is made from the category drop down box(select element). The form displayed will depend on the selection made. Here is the code I have so far. Please help. Code: <body> <label id="Label1">ADMINISTRATOR CONSOLE - ADD AND EDIT ASSETS<br /> </label> <form action="" method="post" style="border-style: ridge; width: 311px; height: 37px;" name="myform"> <table> <tr> <td>Select Category:</td><td> <select name="category" onchange="set_sub_category()" style="width: 157px"> <option selected="selected" value="select">Select an Option</option> <option value="add">Add Category</option> <option value="district">Council District</option> <option value="region">Region</option> <option value="pom">POM</option> <option value="proptype">Property Type</option> <option value="assetcat">Asset Category</option> <option value="assettype">Asset Type</option> <option value="property">Property</option> <option value="asset">Asset</option> </select> </td> </tr> </table> </form> <form style="display:none" action= "admin_console_new.html" onsubmit="return (validate_form(this)& validate_list(this))" method="post" style="border-style: ridge; border-width: medium; height: 154px; width: 346px;" name="district"> <table style="height: 86px"> <tr> <td>Select District Value:</td><td> <select name="district"> <option selected="selected">Select an Option</option> <option>Add Council District</option> </select> </td> </tr><tr> <td>Enter District Name:</td><td> <input name="name" type="text"/> </td> </tr><tr> <td>Enter Description:</td><td><textarea name="description"></textarea> </td> </tr><tr> <td><input type="submit" value="Submit" name="Submit3" /><input type="reset" value="Reset" /> </td> </tr> </table> </form> Hi. I have a form and in the form is a checkbox use as a switch to hide and unhide a two textbox. When the other textbox is hide, the other is unhide such as the code below. When the user click the submit button on the first time and there is an error, it reloads and the id="fieldset.-in_honor" hide because it is set to hide initially but not empty. My problem is, I want to show the fieldset whichever is not empty after submit button is click and there is an error so user will not enter any more information to the other field. Is that possible? Please help. I have a hard time explaining it but hopefully you will get the idea. Thanks in advance and hope to hear from you as soon as possible. Code: /*toggle switch*/
<p><input type="checkbox" name="in_honor" value="" id="checkmemoriam" onclick="showHide(this.name);" />Please check to make this donation in honor of someone special.</p>
/*hide textbox but unhide when the switch is on or the checbox is check*/
<fieldset id="fieldset-in_honor" class="fieldgroup" style="display:none">
<legend class="hide">In Honor Of</legend>
<p>To make this donation in honor of someone special, please complete the two fields below:</p>
<div class="formfield" <?php echo highlight('donate_honor_name'); ?>>
<label for="donate_honor_name">Name:</label>
<input id="donate_honor_name" name="donate_honor_name" class="text" type="text" value="<?php safeEcho($form['donate_honor_name'])?>" />
<?php helper_error('donate_honor_name'); ?>
</div>
<div class="formfield" <?php echo highlight('donate_honor_acknowledgement'); ?>>
<label for="donate_honor_acknowledgement">Acknowledgement should be sent to:</label>
<textarea id="donate_honor_acknowledgement" name="donate_honor_acknowledgement"><?php safeEcho($form['donate_honor_acknowledgement'])?></textarea>
<?php helper_error('donate_honor_acknowledgement'); ?>
</div>
/*always show on first load of the page but once the checkbox is check, will need to hide and delete info entered*/
<fieldset id="fieldset-in_registration">
<label for="impact" style="font-weight:bold">B. Impact Areas</label>
<table>
<tr>
<td style="width:380px;text-align:left"><label for="d" id="deslist4" name="deslist4">Crime and Drug Use <a href="javascript:alert('Ensuring prevention and treatment programs and appropriate support services are available to people who are at risk for drug addiction and supporting efforts to reduce crime.');">what is this?</a></label></td>
<td style="float:right"> $<input id="d" name="d" class="text" type="text" value="<?php safeEcho($form['d'])?>" style="width:90px;" onChange="CalculateTotal()" />
<?php helper_error('d');?> </td>
</tr>
<tr>
<td style="width:380px;text-align:left"><label for="e" id="deslist5" name="deslist5">Early Childhood Development <a href="javascript:alert('Children are healthy, loved, nurtured, safe and have access to quality childcare and early education. This includes programs that increase parenting skills, providing books to all children and providing developmental screening for 3 and 4 year olds.');">what is this?</a></label></td>
<td style="float:right"> $<input id="e" name="e" class="text" type="text" value="<?php safeEcho($form['e'])?>" style="width:90px;" onChange="CalculateTotal()" />
<?php helper_error('e');?> </td>
</tr></table>
Code: /*JAVASCRIPT FUNCTION*/
function showHide()
{
if (document.getElementById('checkmemoriam').checked)
{
if (document.getElementById('TotalC').value == "0.00")
{
document.getElementById('fieldset-in_honor').style.display=""; // this is for showing
document.getElementById('fieldset-in_registration').style.display="none";
}
else
{
var answer = confirm("You entered a total gift designation of $" + document.getElementById('TotalC').value + ". At this time, gifts made \"in honor of someone special\" are not eligible for the designation option. Clicking the OK button will delete all your designation(s). Do you want to continue?")
if (answer)
{
document.getElementById('TotalC').value="0.00";
document.getElementById('d').value="0";
document.getElementById('e').value="0";
document.getElementById('fieldset-in_honor').style.display=""; // this is for hiding
document.getElementById('fieldset-in_registration').style.display="none";
}
else
{
document.getElementById('checkmemoriam').checked=false;
}
}
}
else
{
if ((document.getElementById('donate_honor_name').value="") && (document.getElementById('donate_honor_acknowledgement').value=""))
{
document.getElementById('fieldset-in_honor').style.display="none"; // this is for hiding
document.getElementById('fieldset-in_registration').style.display="";
}
else
{
var answer = confirm("The field you are trying to close will delete all information you entered \"in honor of someone special\" but it will allow you to designate. Clicking the OK button will show the designation list. Do you still want to continue?")
if (answer)
{
document.getElementById('donate_honor_name').value = "";
document.getElementById('donate_honor_acknowledgement').value = "";
document.getElementById('fieldset-in_honor').style.display="none"; // this is for hiding
document.getElementById('fieldset-in_registration').style.display="";
}
else
{
document.getElementById('checkmemoriam').checked=false;
document.getElementById('fieldset-in_honor').style.display=""; // this is for showing
document.getElementById('fieldset-in_registration').style.display="none";
}
}
}
}
Hi As title says : "How to hide div so his content won't be loaded until he is visible?" And is it possible to add preloader for that div? Hi all, I'm trying to hide a form button in javascipt. Within a function I have the following ... Quote: document.getElementById(button).display='none'; However it just errors and says button is undefined. button is the id and name of the form button btw. Do I need to define which form it is part of or something else? Many thanks for any pointers or help. Sir P Hi all - first post - I'm not too hot on javascript so I don't know if this can be done nor how to search for it in the forum because I don't know what keywords to use - but if I give an idea of what I want to do, perhaps someone can suggest an idea of how to proceed? I have two left floated divs - in the left div I want a series of drop downs (possibly check boxes as well) about a series of products. When the user makes their decision and presses submit, I want the form to submit to a javascript function that says "Right, you will need, from your responses, product C" and in the right hand floated div, a series of hidden product info divs whose visibility is changed depending on which product the function determines is the one for you. Broken down into parts I think I need to do the following: a) Standard HTML form with drop downs etc and submit b) Hidden divs c) Submission process locally to javascript function to determine which product to show/hide d) Javascript function that makes the decision e) Javascript that hides/shows products Unfortunately a server side option is not available; it has to be a client side solution and I only could think of javascript. I can probably handle all bar c) and d) - any pointers, help or suggestions would be great thanks! cheers frank What I want to do, is that, when the user select one option out of many from the dropdown box some new fields appears. I was so close to make it , using this example: Code: <script type="text/javascript">
function showInfo()
{
var elem = document.getElementById('verify');
if(document.forms[0].menu.value == "verify"){
elem.style.display="inline";}
else{
elem.style.display="none";}
}
</script>
</head>
<body>
<form action="#" method="post">
<select name="menu" onchange="showInfo()">
<option value="none">Select an option</option>
<option value="email">Email</option>
<option value="verify">Verify</option>
</select>
<div id="verify" style="display:none;">
<input type="text" value="Username" >
<input type="password" value="password" >
</div>
</form>
But what I do want, is that two differen things appear on the page and in the different location of the page. And this script does not read the second <div>. So the result is, that the only first <div> appears. Here are some images of what I want to do. Befo http://img82.imageshack.us/img82/7093/beforens9.jpg After http://img246.imageshack.us/img246/2759/afterzh2.jpg (what has to be changed is on the red circules). So can someone help me with this script?? Please! I am pritty noob to the javascript. Hello, First off thank you for looking at my post. Please forgive me if I do something incorrectly here. I have never posted in a forum before. You are very kind to assist me in this problem. I wish to send the javascript calculated value in a form from one page to another page form. I just need the one value sent. The value is "answer: in the code below. I would like to send it to a form page called "answer.html" I am not a computer person, and I am doing this in frontpage. I do not know how to write java or anything, I just copied this from a free script site and am trying to use it. Thank you once again for your kindness and patience with me. Thanks to all you experts! Michael here is the code I have. --------------------------------------------- Code: <table cellspacing=0 width=427
height=1 bgcolor="#FFFFFF" style="border-collapse: collapse" cellpadding="0" border="0">
<tr>
<td width="634" nowrap height="1">
<script language="JavaScript">
function findcalculatorcalculate(form) {
a = form.debt.value - 0;
b = form.faith.value - 0;
d = a / b;
form.answer.value = Math.round (d);
}</script>
<p align="right" style="margin-left: 3; margin-right: 5"></p>
<form name="form" style=" margin-right: 5; padding-left: 4; padding-right: 4; padding-top: 1; padding-bottom: 1" action="--WEBBOT-SELF--" method="POST">
<p align="right">
<font style="font-size: 11pt; font-weight:700">Input amount <input class="regfont" size="13" type="text" name="debt"></font><span style="font-size: 11pt; font-weight:700"> <br>
divide by
</span><font style="font-size: 11pt; font-weight:700"><input class="regfont" size="6" type="text" name="faith"></font><br>
<b><font color="#FF0000" size="5"> </font></b><font style="font-size: 11pt"><input onclick="findcalculatorcalculate(this.form)" value="CLICK HERE TO CALCULATE" type="button" style="border-style:solid; border-width:2; font-weight: bold; font-family:Arial"><br>
<b>ANSWER</b>
</font></font>
<INPUT NAME="answer" SIZE="5" VALUE=""><br>
<INPUT TYPE="BUTTON" onClick="nextpage()" VALUE="Go to the next page"></p>
</p>
</form>
</td>
</tr>
</table>
<p align="right" style="margin-left: 3; margin-right: 5">I would like ANSWER
field to
pre populate the calculated amount on the second page titled "answer.html" THANK
YOU!</p>
------------------------ Thank you again for helping me in plain language because I do not have the skills that all of you do. I have a order form page and on submitting it opens a new web page that displays the order totals. Below is my code and most probably wrong but for me it seems logic. Please assist. Order Form: Code: <td colspan="1" height="120" align="left"> <select style="margin-left: 60px; background-color: #00FF77;" name="prod_bed_359" onchange="calculateValue(this.form)"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> R359</td></tr> New page I called a unction to print: Code: function itemsOrdered() {
var beds = document.forms[2].prod_bed_359.value;
document.write("<pre><strong>Description\t\tQuantity\tPrice</strong></pre>");
document.write("<pre>Doggie Bed\t\t" + beds + "</pre>");
}
This is still basic as I need to get this right before adding the prices and totals which is also extracted from the order page. I have an html page "PageA" which contains a "link" to another html page "PageB". The link is handled as a form submit because PageA sends some variables which it wants "processed". However, PageB is NOT a CGI script but simply another html page which happens to contain a form. This form handles the desired processing. I would appreciate some help getting some javascript in place, in PageA, in order to automatically fill in a form field in PageB with a variable supplied by PageA. The complications here a 1) PageB is not a CGI script and so sending variables via a query string does not work. (The variables never get read by PageB.) 2) PageB is maintained by another organisation so I cannot modify it. (Actually I could, as I have a local copy, but I would have to redo after every new release and so this is not acceptable.) It therefore needs to be treated as an independent page. 3) The variable is quite a lengthy one, it is extracted from a database and changes depending on how PageA was called, so I want to do this for repeated instances and cutting and pasting to a new page on each occasion is not attractive. 4) I would like to open PageB in a separate window or tab as I want to be able to reference both pages at once. (This is not essential to the key problem but may influence the solution. A solution which depended on the window being the same I would not regard as satisfactory.) The relationship between the documents is probably most accurately described as "PageB is a section of PageA". It is providing some additional information on aspects of what is in PageA. The output from submission of PageB can be quite lengthy. The actual form field in PageB I want to fill in is a textarea element and I know its name (call it name1) and also the name of the form (call it form1). But I don't think the field type should be important. I simply want to update its value (presumably after a page load?). Is this possible without editing PageB? I would appreciate some guidance if not a proven solution. Perhaps I have overlooked something but I can't find a working solution to this particular problem and my experiments to date don't work. Thanks I have a form in an iframe that submits nicely. Here is one of the hidden fields that gives the page to redirect to after submitting the form: Code: <input type="hidden" name="rtrn" value="http://www.domain.com/thanks.html" target="_parent"> The parent target doesn't work, does anyone know how I get the thanks page to replace the page containing the iframe? i have an iframe on my webpage and i am loading appropriate page in it by clicking appropriate button but when user logs out and at that time some page is opened in iframe corresponding to the login pages(like "edit profile") of user then at that moment i want to know that what page is loaded in iframe so that i close it(if it corresponds to pages of login like "edit profile") as user logs out and if it does not correspond to login pages then it remains as it is.For doing that i must know that what page is loaded in iframe and compare it in " if(condition){statement} in logout function" with the logion pages so that i know that if any of them is loaded in iframe and if loaded then close it.Can you help me with that by giving exact code example. Im running js to do some color coding in a table, i tried adding the onload but its not working, can someone take a look ? I need this to run when the entire page is fully loaded and not before. THE FUNCTION Code: var table1_column_settings = [
[32,40], // ito score - First column values more than 5 will be red, 2-5 will be yellow, less than 2 will be green
[11,12], // schedule
[14,15], // cost
[11,12], // execution
[9,10], // commercial
[41,50] // total
];
// Loop through all cells in a table, coloring each one according to column-specific thresholds
function color_cells(table, column_settings)
{
// How many rows are in the table?
var num_rows = table.rows.length;
// Loop through all rows.
for (var r = 0; r < num_rows; r++)
{
// Get a reference to the current row.
var this_row = table.rows[r];
// How many cells are in this row?
var num_cells = this_row.cells.length;
// Loop through all cells in this row.
for (var c = 0; c < num_cells; c++)
{
// Get a reference to the cell.
var this_cell = this_row.cells[c];
// Get the numerical value of the first (and only) node inside the cell.
var cell_value = parseFloat(this_cell.firstChild.nodeValue);
// If it's a number (literally if it's not not not-a-number)
if (!isNaN(cell_value))
{
// Apply the color according to the thresholds for this column number (c).
if (cell_value > column_settings[c][1]) this_cell.style.backgroundColor= "red";
else if (cell_value > column_settings[c][0]) this_cell.style.backgroundColor= "yellow";
else this_cell.style.backgroundColor = "green";
}
}
}
}
EXECUTE THE FUNCTION Code: </TBODY>
</table>
<script> color_cells(document.getElementById("table1"), table1_column_settings);</script>
//I TRIED LIKE THIS <script> window.onload=color_cells(document.getElementById("table1"), table1_column_settings);</script> AND IT DIDNT WORK
Hi all, I am facing problem in preventing my web page being loaded into an iFrame. I search in internet and found this solution : if (self == top) document.documentElement.style.display = 'block'; else top.location = self.location; The above java script code is simple redirecting me to the home page of my web site. But I donot want that kind of solution. When anybody tried to access my web page through iFrame, it should show an error message like "The content of the web site cannot be loaded into an IFrame". This message should be displayed inside the iFrame. For example, if we tried to access "google.com" site in an iframe, the website should not allow the iframe object to load into it, insted it will display an error message along with a provision to open webiste with an external link with it. Any help? thanks, -Sanath Hi, i will try to be as brief as possible. I have a page A with form: Code: <form id="search" action="find.html" method="get"> ... (some select options) ... <input type="submit" class="submit" value="search"> this form look up some holiday destination which appears on this page with url: (example) Code: www.domain.com/find.html?destination=italy&price=500 Now, I dont want to display result on this page, but on page B, in iframe. I found a way how to redirect output as a link to properly show in iframe on page B. Page A contains: Code: <a href="pageb.html?http://www.domain.com/find.html?destination=italy&price=500">show on page B</a><br> Page B contains: Code: <script type="text/javascript">
<!--
function loadIframe(){
if (location.search.length > 0){
url = unescape(location.search.substring(1))
window.frames["iframe"].location=url
}
}
onload=loadIframe
//-->
</script>
<iframe src="" name="iframe" id="iframe"</iframe>
In this case page B will properly load requested link in iframe. Problem is it is just a static link... I want to display search result from the form. Thanks a lot for your help... hi, on my page: here the logos are greyscale but when the page is loading they flash up in colour?! could this be avoided and hidden? here is my Javascript o apply greyscale to my logos Code:
$(window).load(function(){ // On window load. This waits until images have loaded which is essential
// Fade in images so there isn't a color "pop" document load and then on window load
$("#our-work img").animate({opacity:1},500);
// clone image
$('#our-work img').each(function(){
var el = $(this);
el.css({"position":"absolute"}).wrap("<div class='img_wrapper' style='display: inline-block'>").clone().addClass('img_grayscale').css({"position":"absolute","z-index":"998","opacity":"0","margin-left":"64px;"}).insertBefore(el).queue(function(){
var el = $(this);
el.parent().css({"width":this.width,"height":this.height});
el.dequeue();
});
this.src = grayscale(this.src);
});
// Fade image
$('#our-work img').mouseover(function(){
$(this).parent().find('img:first').stop().animate({opacity:1}, 1000);
})
$('.img_grayscale').mouseout(function(){
$(this).stop().animate({opacity:0}, 1000);
});
});
// Grayscale w canvas method
function grayscale(src){
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
var imgObj = new Image();
imgObj.src = src;
canvas.width = imgObj.width;
canvas.height = imgObj.height;
ctx.drawImage(imgObj, 0, 0);
var imgPixels = ctx.getImageData(0, 0, canvas.width, canvas.height);
for(var y = 0; y < imgPixels.height; y++){
for(var x = 0; x < imgPixels.width; x++){
var i = (y * 4) * imgPixels.width + x * 4;
var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
imgPixels.data[i] = avg;
imgPixels.data[i + 1] = avg;
imgPixels.data[i + 2] = avg;
}
}
ctx.putImageData(imgPixels, 0, 0, 0, 0, imgPixels.width, imgPixels.height);
return canvas.toDataURL();
}
Hi, I have a site that runs a javascript slideshow automatically when a user visits it. It is designed in such a way that I cannot pre-load individual images for aesthetic reasons. (Also the whole concept makes my brain hurt.) I therefore need 1 of 2 things: 1. A preloader that doesn't show the page or start the slideshow until all the images are loaded. or 2. I could start with the slideshow paused, and when the page is fully loaded, the play command (currently attached to a 'play' button) is 'sent'. (I'm not techy, so this is the best I can do as explanation.) The latter would probably be more elegant, especially if ultimately I could hide the controls for the slideshow with a loading bar until all the html is loaded, and then show them when the slideshow starts. I'm sorry if this is a really basic question. I tried searching the site but couldn't find anything. If you do feel like answering, can you imagine that you are speaking to a 5 year old. Then dumb it down a bit. I need all the explanation and clarity I can get! Thanks! My source : Code: <html>
<head>
<title></title>
<script type="text/javascript">
function runcode(cwin)
{
cwin.location.replace("javascript:alert("Loaded complete")");
}
function newtab()
{
win=window.open("http://www.google.com");
setTimeout("runcode(win)",5000);
setTiemout("win.close()",7000);
}
</script>
</head>
<body>
<input type="button" value="Click to open newtab" onclick="newtab()" />
</body>
</html>
I want after newtab is opened 5s, alert window will be opened with message:"Loaded complete". Then 2s it is closed. But it isn't what I expect. Please fix it for me. Thanks in advance! Im very new to java scripting so any help would be truly appreciated. I have a single web page that loads several iframes. One of the iframe pages has to be logged in first. I have that taken care of but once the page is loaded I need to change the source to a link with in the page. My guess is I need something to execute the code like a onload or something. This is what Ive been trying to get to work but like I said a newb! The iframe in question is named "cad" the initial source once loaded is 'https://urlname.com/mainmenu.asp' the source I need to change to is 'https://urlname.com/UnitStatusF.asp?agency_id=28' [CODE] function ChangesSrc() { var iframeid = document.getElementById(cad); var unitstatus = 'https://urlname.com/UnitStatusF.asp?agency_id=28' if (iframeid.src = 'https://urlname.com/mainmenu.asp') iframeid.src = unitstaus; return false; } [[CODE] The project I am working on involves a flash piece that communicates with a iframe. Currently the flash piece just calls on javascript functions. I want the buttons in the flash piece to be able to change the src of the iframe. PHP Code: <script type="text/javascript"> document.getElementById('video').setAttribute('src',address2); function closeVideo() { document.getElementById('video').style.height='0px'; return false; document.getElementById('video').setAttribute('src', address2); } function openVideo() { document.getElementById('video').style.height='391px'; return false; document.getElementById('video').setAttribute('src', address); } </script> So the way the code works now is when the page loads it sets the iframe with the id of 'video' to the variable address2 which it pulls from an XML file. In the flash piece when a button is hit, it calls openVideo() which "opens" the iframe and I want it to change the contents to address. This does not work though. It opens the frame but will not change the src. I've tried a bunch of different things now such as make the flash target the iframe using navigateToURL(request1, 'video'); but in Firefox and IE is opens it stills as if I had _blank in there. It does strangely work in Safari. Any ideas how to get this to work? I'm new to javascript so it could be something basic I'm overlooking I am having problems calling a JS function from asp.net code behind button click after some code is ran. The first time the button is clicked and it calls the JSfunction the readyState = loading and it cannot find the element. The second time the button is clicked the readystate is complete and it finds the element. Anybody have any suggestions? Here is the code behind ClientScript.RegisterStartupScript(Me.GetType(), "CC", "<SCRIPT language='javascript'>parent.abc('button1')</SCRIPT>") and javascript function abc(src) { if (document.readyState == 'loading') { alert(document.readyState); } else { document.getElementById(src).click(); } } |
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