Loss Of Precision During Multiplication
Apr 27, 2005
Multiplication of numbers do not give a right value
For eg.
9090909090909.8 * 100 = 909090909090980.1
Why is it so? Is there a way to save the loss of precision.
Actually i want numbers to be rouned to the nearest 2 decimal places only
so Math.round(9090909090909.8 * 100) / 100 is the formula i am using, and hence the multiplication with 100 was required. Since the multiplication give a faulty value, the final result is also not as expected.
I was suprised with the fact
alert(9090909090909.8112) alerts only "9090909090909.8"
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Jul 23, 2005
I have a form form1 where user enters two values input1 and input2.
Then a function addValues () is called:
function addValues()
{
var var1 = parseFloat(document.form1.input1.value)
var var2 = parseFloat(document.form1.input2.value)
document.form1.output.value = var1 + var2
}
When I enter 4.0001 and 1.0001 the result in my script is not 5.0002 but
5.0001999999999995 Of course this is sufficiently precise in most uses, or can be rounded off. Still I have seen no other language where rounding errors are so prominent after one simple addition.
Are these errors a result of parseFloat() ? Am I missing something crucial ?
Is there an easy way to increase the precision?
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Jul 23, 2005
I've got a strange problem in IE that I wonder if anyone has seen
before. Basically, I've got a two window scenario. The parent window
opens the child via window.open(). The child contains a form and
submissions are processed in the child window. When the child window
form is submitted and the results are returned, an alert box is thrown
up via setTimeout("alert(....)", 2000). For some odd reason, when
this alert is displayed, focus is transferred back to the parent
window with the alert box on top. When you press the OK button on the
alert, focus is transferred back to where it should be; on the child
window. This doesn't happen all the time. But it happens. Is there
something I can do to solve this mystery?
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Apr 29, 2011
I cannot figure out why navigation panel buttons are losing CSS formatting and their function as HTML buttons.The page markup (in index.html) is here:[URL]There is one external CSS and one external JS file that contains all the I have traced the problem to a single Javascript line during the initialization (first loading) of the document.
Code:
61: contentPanel.replaceChild(content, contentPanel.firstChild);
This is line 61 in the function jumpToPage() in the ncluded external Javascript file ReGenaVetLabs.js Up to this script statement, the buttons are active and the mouse cursor shows as a pointer. After it executes, the cursor is no longer a pointer, and the buttons not clickable.It does not make sense to me why the left-side navigation buttons should be affected.
The page layout has four parts:
1. top panel (constant)
2. left-sided middle panel for navigation with buttons (constant)
3. right-sided middle panel for content
4. bottom panel (constant)
"(constant)" means it does not change from page to page.Although there is only one physical page---which is index.html in this setup---the content is loaded using scripts: the page is full of text and images that are contained inside DIV elements whose display is turned off (style="display:none;") and the DIV content is loaded using Javascript, simply by using the DOM .replaceChild() method for the DIV element that makes contains panel labeled 3 above...the content panel.Later on, I will make each page a separate HTML page, to deal with browsers whose script use is deliberately disabled. But this development is easier for me, and it avoids the new page loading appearance: browser window clears, browser loads wanted page.
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Jan 29, 2009
highprecisioncalculator in java script
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Mar 9, 2009
I need to make a Prompt box with Multiplication.
Ex. When the box pops ups asking for a number , I type in 5 and it can tell me
5x1
5x2
5x3
Etc .
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Jul 8, 2009
How can you make a multiplication table using For loop? I've been trying to make one, but still.. :(
Anyway, if you have one.. May I see how you do it? ( codes )
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Dec 3, 2011
I'd like the posted result to be a number with two decimals. I know how to make this normally but not with this kind of script.
<html>
<head>
<script type="text/javascript">
function calcResult(){
document.getElementById('result').innerHTML = '';
[Code]....
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Oct 1, 2009
I am trying to set up a toggle to allow users to show more precision when a user clicks a button. I have a function high() that doesn't do anything when it is called. I am fairly new to jQuery so I am not to familiar with the syntax.
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Mar 20, 2009
I am accepting an array, and a value of a variable to perform multiplication against my array, then write the product back into the array.
[Code]...
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