Math Operation On Class Name
Jan 21, 2005
i have a column which have some numbers into...
and any td of this columns have class="something"...
so i want to sum the tds of that column which have the same class name when i click on the first cell..
ie
Code:
+---+
| | -> i click here
+---+
| 3 | -> class="ha"
+---+
| 4 | -> class="haha"
+---+
| 2 | -> class="ha"
+---+
| 8 | -> class="haha"
+---+
so here i want the sum in this column where the class name is "ha"...
so the sum is 3+2 = 5...
all that have to happens when i click on the first cell!
any suggestion??
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Feb 20, 2010
the program that i want to create will first let the user input how many execution he want to perform and will determine the highest and lowest number that he inputted.
for example.
prompt: how many execution you want to perform?
i type: 5
prompt:input number:10
prompt:input number:8
prompt:input number:5
[Code]....
but it only allows for the up to inputs[6] and the code is very long. i think i can use looping in it. but i dont know to use looping in math.min and math.max.
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Feb 14, 2007
I've this comparison with two numbers
if (t.minimum.value t.maximum.value) ...
yet it's always true except when minimum and maximum are identical. Why
isn't it false when minimum is smaller than maximum?
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Jun 27, 2009
http:[url]....but this example has a problem that after a new task has been added by ajax, it does not update the task lists ie suppose i have 2 task in the list now and now i add another one successfully, it showed me the message that 1 task has been added name "foobar" but in task list it still shows 2 tasks not 3.How to update the task list div>ul after the ajax operation Well I tried something like below
$('#submit').click(function(){
var note = $('#wrapper textarea').val();
if(note == defaultText || note == ""){[code].....
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Mar 18, 2011
I am looking for a jquery plug in that will make it easy to enter Hours of Operation ( to indicate when a business is open) as a form element. My current solution is Egor Khmelevs Safari Style Slider [URL]..) but it will not jump to where you click on the slider, and will only allow selection by dragging the pointers.
Is there a way to modify this plug in to accept click events to set the pointers? Or is there a better solution for what I am attempting? My hours of operation slider is just like the last demonstration on that page, except it spans 24 hours.
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May 25, 2010
we suppose of being able to choose on a various menu drop down functions, for example:
pippo=a+b
pippa=a-b
cippa=a*b
[code]....
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Sep 23, 2011
I have an array of divs, and can do a style change on them:
var Ray = new Array("first", "second", "nth");
function bluRay() {
$('#' + Ray.join(',#')).animate({color: '#00f'}, 600);}
( The divs don't share a class, and it'd be code-heavy to add classes for all the necessary variations on this function. )
How to make the operation on the divs sequential, at say, 500ms intervals?
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Sep 13, 2010
I have tried this without success:
$("@font-face").css("font-family","myCustomFont");
$("@font-face").css("src","url('myFontLocation')");
trying to emulate the expected CSS3 statement:
@font-face {
font-family: "myCustomFont";
src: url("myFontLocation");
}
Is this possible? If so what is the exact syntax?
Searching found no clear answer, though I ran across Cufon and similar libraries, but I would rather stay in jQuery if possible.
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Jan 28, 2010
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Jun 16, 2009
i have following problem: When the user on my website presses a image link, I prevent the default behaviour, and toggle some table rows (show or hide them, depending on the the image src (closed.gif / opened.gif)). Since I got a lot of rows I run over and toggle, the function takes some time to process and the browser "hangs" in the meanwhile. Due to this I want to show the user that the operation is still in progress and want to change the image of the link to a load spinner until it is finished. So I thought that I just have to change the src URL of the image in advance and then start the function, but jQuery is ignoring the line and I don't know why? Here is the code I am using:
$("a[name='changeDisplayModeAll']").click(function(e) {
e.preventDefault();
var newStatus;
var imageSrc = $("img[name='imageChange']").attr('src');
[Code]....
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Aug 19, 2011
$(".DdsConstant").each(function (index, element) {
var text = $(element).html();
$(element).html(text + ":"); });
The above code works for me, but I want to be able to skip the elements that already have a colon or question markin it.Example: Search Name: or Perform this daily? should be skipped. But Search Name should be changed to Search Name:. I will put question marks in manually. I have tried a few things and done some searches but no luck.
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May 25, 2011
I'm just now trying to get my head around AJAX in general and jQuery's AJAX specifically.I have a table that is generated from php/mysql. A sample of the rendered page can be seen here. I've also attached a text document with the php code that generates the page.What I'm trying to do is, when a user clicks on one of the edit buttons, I want to open a jQuery UI Dialog popup and populate a form with the current information for the class the user clicked on. Then, after the user clicks on a Submit button (and some basic validation), jQuery's ajax() sends the data for processing to a php script. Upon successfully processing the changes to the class I want to close the Dialog popup and show the changes in the table on the main page.[code]
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Feb 12, 2010
i have a table with three columns , quantity and rate amount.when user puts in quantity, and rate their multiplication is given in amount. and then these amounts will be added and total will be given.in the table you can add and delete rows dynamically.
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May 21, 2007
Anyone any idea why the Math.abs() isn't working in this code? I
thought it was supposed to convert negative numbers to whole numbers?
var se = [-27, -27, -27];
var time = 100
if(se[0] < 0){
Math.abs(se[0]); //<-- this isn't converting it to a whole number
se[0] += 1;
se[0] = (se[0]/(time / 4));
}
The result I get is -1.04 when it should be 1.12
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Jul 20, 2005
I remember there is a programming language where you can initialize the
random number generator, so that it can - if you want - give you the exactly
same sequence of random numbers every time you initialize it with the same
parameter. Can this be done with JavaScript? I couldn't find anything in the
documentation. Basically, what I want to achieve is to obtain always the
same sequence of random numbers for the same given initialization value (but
of course different sequences for different init values).
Can this be done in JavaScript?
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Jul 23, 2005
Javascript has a very small math function list. However there is no
reason that this list can not be extended greatly. Speed is not an
issue, unless you nest complicated calculations several levels deep. In
that case you need much more ram than a PC has to store functions
calculated in loops so that you do not have to recalculate every time
you cycle through the nest of loops. Using a HD for storage to extend
ram is much too slow for many applications.
Some functions such as hyperbolic ones are easy to add, since they are
just simple combinations of the built in javascript math functions. I
have found a few examples on the web such as Bessel functions. I found
far fewer javascript math functions than I expected on Google searches.
Thus I have had to write several functions of my own.
See http://www.cwdjr.net/math/I0L0andI1L1.html for an example of two
"functions from hell" that are very difficult to evaluate. Fortunately
there are Fortran programs that can be used as a starting point. I was
able to modify the Fortran programs to work on javascript. I have used
these functions for technical applications in the past.
The page is set up to reject the NN 4 series, because it will not
support some of the script needed such as .toExponential(n) and
to.Fixed(n)for writing output in exponential or fixed format. I was
amazed that even the old MSNTV(former WebTV) set-top box, that no
longer is being made, will even support these output formats. I wonder
about IE4. If it will not support these output formats, I can easly
block it by checking for document.getElementById.
The code works properly on the latest versions of IE6, MSN9, Firefox,
Mozilla, Netscape, and Opera. I am not selling anything, so for a
special interest page such as this, I see no need to support older
browsers.
The advantage of doing math with javascript is that it is so portable.
You can do it anywhere you can use a computer, or you can do it on your
own local computer offline. There are several math programs for PCs
that will do very much more than you can hope to do with javascript.
Unfortunately the program I would like costs about US$ 1800. Also there
are versions you can install on a server, but these also are expensive.
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Mar 5, 2010
why I am getting Nan
<script type="text/javascript">
var num1;
var num2;
var num3;
[Code]....
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Jun 18, 2010
<script type="text/javascript">
function countItDown(){
var current=parseFloat(document.getElementById("currentsecondscount").value);
var seconds=current;
document.getElementById("debug").innerHTML="S "+current;
var minutes=Math.floor(seconds/60);
[Code]...
im not sure why Firefox is doing this. it seems to work fine on Firefox 3.6.3 for Mac.
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Nov 23, 2010
I have this simple manual photo slide show. It shows four photos and when you click the next button and it moves one photo over and one photo back for the previous button. I have to moving by changing the CSS property of 'left' by 195 pixels each move. So for it to move next it will subtract 195 pixels from the left property and for moving back it add 195 pixels to the left property. I have the code setup so when you click it changes the property of left to either -195 or 195 pixels but I need it so it actually does the math, not just give it a set value. But I don't know how to do that.code...
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Feb 10, 2011
I have a website that allows users to enter complex mathematical formulas into a text field and evaluates them.
I am currently using eval() because it not only can handle all the standard mathematical functions, but also gives them access to the Math object. That way the users can use functions such as Math.max() and everything else.
I realize, though, that using eval is evil, I assume because a malicious user might throw in some more damaging javascript that would be run without checking it. (That's why eval is evil, right?)
Is there a way that I can allow my users to construct complex mathematical formulas and use the Math object (or an equivalent) without potentially opening my site up to harm?
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Nov 8, 2011
Just started to learn java & came up with the following, but can't get the math.round to work. Anyone able to tell me where I'm going wrong please ? code...
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Nov 10, 2005
If I have the following
2^n=a
javascript:Math.pow(2,n)=a;
and I now a how do I then find n with javascript?.
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Nov 12, 2010
I have 3 divs. I want distribution them random (when refresh the windows, three divs' position will be changed)
I think Math random() can solve this problem, but how to do that? code...
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Nov 7, 2006
Code:
function finalSize(){
var size = document.getElementById('size').value;
var margin = document.getElementById('margins').value;
var mirrors = document.getElemntById('mirrorsRadio').value;
var size_array = size.split('x');
var h = size_array[0];
var w = size_array[1];
var finalH = ''
var finalW = ''
if(margin > 1){
finalH = h * margin;
finalW = w * margin;
document.getElementById('finalSize').value = finalH+'x'+finalW;
}else{
newH = h * margin;
newF = w * margin;
finalH = newH + h;
finalW = newW + w;
document.getElementById('finalSize').value = finalH+'x'+finalW;
}
}
I see it's ok, but it gives me this error:
Object doesn't support this property or method.
I don't know what I'm doing wrong. All I know is PHP, but from what little I learned on Javascript, my brain is telling me I'm right, but my experience is telling me I'm wrong. XD
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Feb 15, 2012
I have following codes
<html><head>
<title>this is first math exercise within Java Script</title>
<script lanuage="Javascript">
function total(){
Var amount1 = text1.value
Var amount2 = text2.value
Var total=eval(amount1) + eval(amount2)
text3.value=total
alter("Correct Answer")
} </script>
</head><body><center><form>
<table width="20%" border="1" cellpadding="1" cellspacing="1" >
<tr><td width="10%" align="center">Amount1</td>
<td width="10%"><input type="number" name="text1" value="" min="1001" max="8000"></td>
</tr><tr><td width="10%" align="center">Amount2</td>
<td width="10%"><input type="number" name="text2" value="" min="1001" max="8000"></td>
</tr><tr><td width="10%" align="center">Total</td>
<td width="10%"><input type="number" name="text3" value="" min="1001" max="8000""></td>
</tr><tr><td width="10%"></td>
<td width="10%"><INPUT TYPE="button" NAME="Submit" VALUE="Compute" onclick="total()">
<input type=reset Value="Clear" size="30"></td></tr>
</table></form></center></body></html>
I want to get summed value in text3 but function does not execute.
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Jun 3, 2010
My code: [URL]... When I click on Upraviť in class edit I need add some HTML code to begin and to end of class entry how to I can select class entry in the same class post on which I clicked?
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