Default Function Values
Aug 5, 2005
is there a way in javascript to provide default values for function variables.. for instance
In my case the problem is this, i have tables on about 10 pages that all use the same type of table that have checkboxes next to each row, indicating each row could be possibly edited or deleted. Now, i have a function to check/uncheck all by clicking the top box in the column. It works fine, but on one page, i actually have two of these tables. This screws it up though as it will check everything in the first table when i click the select all input box on the second table. I was hoping i could simply change the value for the id of the table and then pass that id instead of passing nothing.
in php it would look like this
function my_function($default_value = "hello") {
in javascript i dont know if this is possible though, it threw errors when i tried syntax similar to that.
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Sep 14, 2010
I am looking for a way to put all CSS values on my selected elements back to its default. I was wondering if anyone has maybe done this before and if not has any idea's to get me started.
The idea is that when I use for example:
The elements within .setDefault will return to its default font/color/height/width etc... so basically all posible values.
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Sep 8, 2004
I would like to call a function with parameters, i.e. multiply('2','3','box1').In this example, the first argument would be multiplied with the second and written into the div with the id="box1". How can I set a default value for the third argument? => so if I call multiply('2','3') then it should automatically set the output-variable to 'box1' if not other defined in the call.
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May 10, 2009
I'm trying to program a reset button so that when the user clicks on it , the default values will be restored but the only problem is that the cells are returning undefined but are showing in the correct cells . Here is my code for that . Here , the function ResetGrid() is the problem.
[Code]...
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Sep 1, 2007
I'm moving from php to JavaScript. What I want to do is assign a value to a variable only if the variable hasn't been assigned yet.
In php it would be:
if($variable=='')
$variable='default value'
I thought the equivalent in javascript would be:
if(variable=='')
variable='default value'
Can anyone explain why this doesn't work, or what I should do instead?
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Oct 8, 2010
I've read a few solutions to this, but none seem to fit what I'd like to do. I'm quite new to JavaScript, so I'm trying to learn various solutions to problems and also what can and can't be done.
What I'd like to know is can you, on submit, check all the form values on a page, or indeed within a specific form on a page, for their default values, and if any still have their default values as the text within that box, clear that value.
So using some generic form values as an example, if I had a form that had three text fields Name, Email, and Phone, all by default populated by their respective names, if someone changed the value of Name to "Adenv" but left the other two, on submit the script would change the values to:
With *blank* indicating a blank field. Is this possible?
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Sep 26, 2010
I have a form that gets automatically filled based on the values returned by my php file. Then the form elements have their values filled.
Now the problem is, I have set few additional show and hide <div> tags based on the values of some other fields. So when the form loads, the <div> tag doesnt show up and stays hidden only as the event that activates it is based on the radio button's change event function.
So my question is, as the form loads, how can I have these <div> show/hide based on the default values of the text fields on which they depend upon....
jQuery(document).ready( function()
{
jQuery(".hidden, .error").hide();
//
This only gets activated when the radio button is changed but i want this to be checked on change as well as based on initial values... How do I do that ?
jQuery( jQuery("input[name='ssc_appear']") ).change
( function()
{
if ( jQuery("input[name='ssc_appear']:checked" ).val() == "yes" )
[Code]....
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Jan 20, 2011
I was wondering if it is possible to restrict the values of a text input box to only accept set values such as "XBC1". I am trying to make a form for a scanner so you can scan bar codes and it will auto fill the form out and have default values set so incorrect values cant be submitted into the database and mess everything up.
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Jul 24, 2010
I'm working on a site and for my login area, instead of using labels for the textboxes, I wanted to just put default text in there.
The JS that I am using is supposed to only enter the default values in the textboxes if they are blank. Unfortunately, I think the JS runs before the browser puts the "auto remember" stuff into the boxs, so the JS will always put the default values in the boxes.
The problem is that, when its time for the browser to enter the auto remember stuff, it sees that there is already stuff entered, so it doesn't enter the previously-remembered login information.
I'm pretty sure that what I'm trying to do is possible, but maybe I'm going about it the wrong way. Could somebody suggest the appropriate way to do this? code...
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Aug 28, 2006
I have to add some technique which will solve the following problem. A form is presented to the user in our web application. Say it has
4 text fields,
2 radio buttons (Yes / No)
1 checkbox
1 select list.
Now 2 textfields are pre-populated, one radio button (Yes) is pre-selected, checkbox is not checked, one option from select list is preselected.
Problem:
In 90% of the cases, all that the user needs to do is enter values in the 2 empty textfields and click Submit.
However, the user might change the values in the preselected controls, like check the checkbox, change radio selection from Yes to No, select a different option from the select list, change the default values from the prepopulated text fields.
Now in such a case where 'default' values are changed, I need to show a alert or a popup layer to the user when the submit button is clicked.
Showing a popup layer or an alert:
The popup layer/alert will be a confirmation popup which will say something like -
"You have changed the default values for:[all the fields which were changed by user]. This requires you to do [some task] once you submit the form.
If you do not wish to change these defaults, click Cancel.
To proceed with the changes, click OK and then Submit."
Clicking OK:
If user clicks OK, then all is well. User will click Submit to submit the form and do some task which is required when defaults are changed.
Clicking Cancel:
If user clicks Cancel then the defaults should be restored. User is now free to click Submit. Code:
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Mar 1, 2006
When my page loads, I check for the existence of a cookie value through
readCookie(). If there is a value present for the cookie, I would like
that to be the default value in function ordering() and that value to
be the SELECTED value in ddlProfileNames. In other words, if there is
no cookie value, then function ordering will default to
ordering("Div1,Div2,Div3,Div4"). If there is a value, then that should
be used in function ordering and as the default value in
ddlProfileNames. Thanks for any help.
<body onLoad="readCookie('default')">
<FORM name="frmProfileNames">
<SELECT class="smalltext" id="ddlProfileNames"
onChange="ordering(this.options[this.selectedIndex].value);">
<option value="Div1,Div2">1 & 2</option>
<option value="Div3,Div4">3 & 4</option>
<option value="Div1,Div2,Div3,Div4" SELECTED>All Sections</option>
</SELECT>
<a href="#" onclick="setCookie('default', 30);return false">Save as
Default Profile</a>
</FORM>
<SCRIPT>
function ordering(sorder)
{
// code here
}
// start things off:
ordering("Div1,Div2,Div3,Div4");
</SCRIPT>
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Jan 28, 2009
How do i declare a default value in a function? I have a simple function
function color_input(id,token){
if (!empty(token)){
document.getElementById(id).style.backgroundColor = '#2A2A2A';
document.getElementById(id).style.color = '#DDC58C';
[Code]....
You will notice that the #2 parameter is missing in the html call. Sometimes i don't have it to send. in PHP i would just set the functions second param like token=''
function color_input(id,token=''){}
How do i set a default param in a JS function?
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Apr 21, 2007
I've been searching now for quite a while trying to look for a way to give the default value to a function argument if it's not given. For example, in php one would do the follow:
function func_name(foo = 'default') {
...
}
In the above case, if foo isn't supplied while calling for the function, then foo would default to 'default'. I have tried that in javascript, but it doesn't appear to be working, so I am wondering how should I do this in javascript?
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Jan 27, 2009
How do i declare a default value in a function? I have a simple function[code]...
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May 21, 2010
Anyway, I am using some code that someone else wrote so I claim no credit here for the code.It works great and I've managed to persuade to work in Wordpress but I have one thing I would like to change.Basically the text I am trying to toggle is "shown" on page load - I would like it to be "hidden" until the user clicks on the link to make it appear.Here's the code:
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-
[code]....
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Mar 1, 2010
how to handle a callback of an event, before it performs the default href function.
<code>
<a href = '<?php $url ?>' onclick = myFunction(); return true;>Click Here</a>
</code>
I want the onclick event to finish completing and then perform the default href function, which is denoted by the "return true". The javascript "myFunction()" opens a window in a pop-up and it has a submit button in it. I would like to wait till this page loads in the pop-up window and only after the user clicks on the close button, the default href function needs to be carried out. I cannot figure out on how to get the callback from this event.
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Jul 11, 2006
Can javascript using pointer or pass variable by reference?
Or I need to using object or Array to return the two values?
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Apr 12, 2010
I was wondering if I can pass my php variables through javascript function. Actually i have a simple table of pictures, when clicked in the picture a new popup page comes up, it working fine uptill this stage but now I want to pass a value through it, for instance if user clicks on picture1 then my popup url should be "item_large.php?id=pic1.
My Javascript junction for the popup window:
function popup() {
window.open("item_large.php","Register","menubar=no,width=500,height=400,toolbar=no");
}
My Html code where I have my pictures:
<td height="19" align="center" valign="top" onmouseover="this.bgColor='#CC3300' ; this.style.cursor='pointer'" onmouseout="this.bgColor='#FFFFFF'" <A HREF="javascript:popup()">Picture01</A> </td>
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May 2, 2010
urrently I have the user log in, choose their character, and then go to a page where they can fight random monsters. When they get to the page to fight with the random monsters, the character's information as well as the random monster's information is pulled from tables in my database.
What I would like to do is when the user clicks the Attack button, perform a function that takes the monster's hp ($hp) and subtracts from it the character's attack combat value ($acv1).
how I can access the php variables within my JavaScript code and how I can go about doing this type of calculation?
I'd like to store the monster's hp in a javascript variable, so that when the character attacks, the hp can be updated until the character has reduced the monster's hp to zero, in which case a php script should be run that updates the character's table.
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Jun 24, 2010
i have this code the class name Efiveper having the edtitble values.. I am trying to get all the values on change any editable this values I need to store in array so that I can pass that array of values to the controler to update that perticular user..my questions is how to get the more than one updated fieldset values on change function?
[Code]...
this updatefield array I am passing to the update method to update that user..this array values should be more than one if user is changed number of editable fields in the second fieldset...
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Jan 20, 2009
I've got a glitch somewhere and it's not obvious to me. Maybe someone can spot it.My problem is that the functions seem to return values but don't display them like they should. I'm testing returned values with a function called sayvalue(item). But when I test "DelTimeCode" the function returns "[Object]". I don't understand. I get returned values from DelTime and DelTitle.My approach is to select a radio button option, return a delivery title and a delivery price from the appropriate functions then write the information. I think I'm close. Any suggestions or observations of an error in my code?I have the following VARIABLES and FUNCTIONS:
<head>
var AmtSV;
var DelTimeCode="";
[code]....
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Oct 26, 2009
In the DOM Scripting book by Jeremy Keith, he provides this function:
Code:
function styleElementSiblings(tag,theclass) {
if (!document.getElementsByTagName) return false;
var elems = document.getElementsByTagName(tag);
for (var i=0; i<elems.length; i++) {
var elem = getNextElement(elems[i].nextSibling);
addClass(elem,theclass);
} }
And then says to pass the values "h1" and "intro" to this function in this form:
styleElementSiblings("h1","intro");
I'm just a little stuck on how to "pass the values". Presumably I've missed something simple. I've tried just pasting that line before the function, but no luck. He also provides a function that allows multiple functions to load at once, called addLoadEvent, so I tried this, also with no luck:
addLoadEvent(styleElementSiblings("h1","intro"));
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Jul 23, 2005
Does anyone have a code snippet to compare those values so I can sort
the array of alpha-numeric values that include both characters and
integers in it?
I.e., if we have values like 4236 and 123234, I want 4236 to be second
because 4 is bigger than 1 rather than using the numeric comparison.
The strings can include character values and strings. Basically, I have
the bubble sort function, the question is how to compare those types of
strings in the alpha-numeric order.
i.e.,
A83745
B34974
127734
34456
788
I looked all over the web thinking that this simple question would be
answered somewhere, but could not find the answer.
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Jul 26, 2010
I am usign $.post() method to post selected value in a drop down to server. On server-side I fetch resultset based on the selected value, and serialize the result set via the Response object which is fetched by the on Success function within $.post. How can set the textbox values conatined within that result set to those textboxes? Rather how can I fetch each of the values out from that response object in JQuery?
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Oct 28, 2009
I've written a re-usable function to erase and replace a form input value, but when I try and restore the value and colour it will return "undefined" instead of what should be there
Code:
function erase_replace_value() {
// get all of the input tags
[code]....
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May 5, 2010
I have the data of every user inside an XML file, such as address, username, email etc. I want to add markers to the map depending on the address and I want every marker to display a info window with data of the user in that location. The problem is that I get an error when I try to pass the other data with the getLocation method of the geocode. The markers are displayed in the map but the data in the info window aren't.
Code:
GDownloadUrl("mysql_to_XML.php", function(data) {
var xml = GXml.parse(data);
var markers=xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var username = markers[i].getAttribute("username");
var email = markers[i].getAttribute("email");
var address = markers[i].getAttribute("address");
geocoder.getLocations(address, getCoordinates(email, username));
}});
function getCoordinates(response, email, username) {
place = response.Placemark[0];
//Retrieve the latitude and longitude
point = new GLatLng(place.Point.coordinates[1],place.Point.coordinates[0]);
var marker = createMarker(point, username, address, email);
map.addOverlay(marker);
}
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