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wanted to add two floating number which gets concatenated as string

i want to add two float number with fixed two decimal but its converted to string and get concatenated.I know its simple question but actually i'm in hurry
var a=parseFloat("15.24869").toFixed(2)
var b=parseFloat("15.24869").toFixed(2)
Update when i enter input as
var a=parseFloat("7,191");
var b=parseFloat("359.55");
c=(a+b).toFixed(2)
O/P:NAN
why so?

The .toFixed() method returns a string. Call it after you've performed the addition, not before.
var a=parseFloat("15.24869");
var b=parseFloat("15.24869");
var c=(a+b).toFixed(2);
After that, c will be a string too, so you'll want to be careful.
As to your updated additional question, the output is not NaN; it's 366.55. The expression parseFloat("7,191") gives the value 7 because the , won't be recognized as part of the numeric value.

Just add parenthesys to parse float the whole result string
var a=parseFloat((15.24869).toFixed(2));
var b=parseFloat((15.24869).toFixed(2));
c=a+b

doing c = a + b adds the two answers together. You might just want to turn them into a string then concatenate them.
var a=parseFloat("15.24869").toFixed(2)
var b=parseFloat("15.24869").toFixed(2)
var c = (a.toString() + b.toString());

javascript parseFloat bug

I am subtracting multiple textboxes using JavaScript. I'm adding the total amount in the textboxes.When amount is first entered it works fine but when I change the amount and save it again there is a bug.The value is pulled from database the second time and is in "00.00" format.
The problem is when the value is a 4 digit value say "6500.00" it changes to "6.00". It shows as 6500.00 in the webpage but during calculation in JavaScript it calculates as "6.00".it works fine for 3 digit value like "400.50".Can somebody tell me what's the problem here.
JavaScript:
function fill_balance()
{
var total = document.getElementById("total").value;
var payment = document.getElementById("payment").value;
document.getElementById("balance").value = parseFloat(total) - parseFloat(payment);
}
P.S: I use number_format() function to change the format to 00.00

Converting Text Field to Numerical Value (Getting NaN)

I have this bit of code, it's supposed to take the value from one field, and calculate the value from it based on a certain percentage (in this case 60%).
I created a hidden field to store the value in the html, but when I run the calculation and check it in Firebug it gets a NaN value. Can anyone tell me what I can do to produce the number I need?
(Apply_RequestedAmtX_r != 0 & Apply_RequestedAdvanceAmtY_r !=0){
var AmtX= ($('#Apply_RequestedAdvanceAmtX_r').val());
var AmtY= ($("#Apply_AmtYAfterSplit_r").val());
var MaxAMT = parseInt((AmtY*60)/100);
$('#mna').val(MaxAMT

val returns a string. Now, the way you're using those variables, they'll get automagically converted to numbers (although it's best practice to parse them yourself).
One or the other of your values has a character in it that prevents the value from being automatically converted to a number; and then since that's NaN, any math involving it will be NaN. If you examine AmtX and AmyY in Firebug before using them, you should see whatever that character is.
Again, parsing isn't the actual problem here, but you're using parseInt in exactly the wrong place (unless you were trying to use it to truncate the fractional portion of the number, in which case there are better choices). Here are the right places:
var AmtX= parseInt($('#Apply_RequestedAdvanceAmtX_r').val(), 10);
var AmtY= parseInt($("#Apply_AmtYAfterSplit_r").val(), 10);
var MaxAMT = (AmtY*60)/100;
MaxAMT will likely have a fractional portion. If you want MaxAMT to be an integer, then:
var MaxAMT = Math.round((AmtY*60)/100);
// or
var MaxAMT = Math.floor(AmtY*60)/100);
// or
var MaxAMT = Math.ceil(AmtY*60)/100);
...depending on your needs.

Combining retrieved values with javascript and jquery [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How do I Convert a String into an Integer in JavaScript?
I have a select element that contains options for products. What I want to achieve is when they pick an option the price on the page automatically adjusts. I have figured out how to retrieve those values but when I combine them it just puts two numbers together instead of actually adding them.
For example instead of outputting 60 when I have 50 + 10 it outputs 5010.
My code:
$('.product_options').change(function(){
var base_price = $('#base_price').html();
var add_price = $(this).find("option:selected").data('price');
var new_price = base_price+add_price;
console.log(new_price);
$('.current_price').html(base_price+add_price);
});
Is there a way I can convert them both to integers so the operation actually goes through?
Thanks in advance!

Use parseInt
$('.product_options').change(function(){
var base_price = parseInt($('#base_price').html(), 10); // 10 as second argument will make sure that base is 10.
var add_price = parseInt($(this).find("option:selected").data('price'), 10);
var new_price = base_price+add_price;
console.log(new_price);
$('.current_price').html(base_price+add_price);
});

Try:
var base_price = +$('#base_price').html();
var add_price = +$(this).find("option:selected").data('price');
See the mighty: Mozilla's Arithmetic Operators Reference - Unary Negation

Any values you pull out of the DOM are going to be strings, and need converting into number types before you can do mathematical operations with them.
parseInt( ... ) is a built in javascript function that converts a string into an integer, if the string consists of digits only.
If you need a decimal number, you can use parseFlaot.
var new_price = parseInt(base_price)+parseInt(add_price);
// new_price is now set to the sum of `base_price` and `add_price`

Use parseFloat or parseInt
$('.product_options').change(function(){
var base_price = $('#base_price').html();
var add_price = $(this).find("option:selected").data('price');
var new_price = parseFloat(base_price) + parseFloat(add_price);
console.log(new_price);
$('.current_price').html(base_price+add_price);
});

Yes there is.
intval = parseInt(string)
is what you're looking for.

How to convert a string return from a JQuery slider UI into a number

I have two sliding bars and I want to get the value the user sets them to and do some maths on it. var days and var total are my attempts to do this. I was taking it that the UI slider stores its values as stings and not integers. But both my attempts below, then use either just return a NaN value? So what am I doing wrong?
var days = parseInt($(this).attr('#day_output'), 10);
var total = parseInt($('#amount_outputTotal'));
var fees = 5;
var valueout;
valueout = 60 * days + fees;
$(document).ready(function() {
$('#Output').html(valueout);
});
Many Thanks Glenn.

Why would a slider, which is a representation of numbers, store the value as strings? You can get the value (or values, if two handles) with the following code
var val_single = $('#your_slider').slider('value');
var val_array = $('#your_slider').slider('values');
Please rtfm http://jqueryui.com/demos/slider/

One of our projects using jqueryUI ahs following code:
fixed = $().fixFloat(ui.value);
I understand that this might don't suit your needs.
Try to change from parseInt to parseFloat and also output via console:
$(this).attr('#day_output')
Why here is nothing like .attr or .val or something?
$('#amount_outputTotal')