Another rookie math question...

I'm trying to understand and display simple math results, but I get an
unexpected value. Hope this isn't too confusing.
I'd like to add quantities like 2 + 1 + 3 + 0 + 0 to = 6. But instead I
get a result like: 21300

-- I'm trying to get a total number of items ordered using:

var total1=eval(parseInt(f.item1_quan.value*23)) <- how cost total is
var total2=eval(parseInt(f.item2_quan.value*41)) derived for each item,
var total3=eval(parseInt(f.item3_quan.value*15)) for reference. Numbers
are
var total6=eval(parseInt(f.item6_quan.value*15)) item prices.
var total7=eval(parseInt(f.item7_quan.value*17))

- I added:
var disc_quan = (f.item1_quan.value + f.item2_quan.value +
f.item3_quan.value + f.item6_quan.value + f.item7_quan.value)

-- I'm displaying the result on my form for this test using:
<td colspan="2" align="right"><font face="Verdana" size="2"> Test Quantity
Total</td>
<td><input type="text" size="7" name="discount_qty" onFocus="this.blur()"
value="0" /></td></tr>

-- Legend for this post:
item1_quan: form field name for quantity of item
disc_quan: total quantity of all items, 2+3+1+0+0=6

I hope I have included enough info to make this understandable.

Any suggestions appreciated.

I fixed it!

I had to use "parseInt" to contion each field/variable from the form like:

First, I converted each form field to a variable: f.item1_quan.value -->
item1q.

var disc_quan = (parseInt(item1q) + parseInt(item2q) + parseInt(item3q) +
parseInt(item6q) + parseInt(item7q))

Apparently I had string values instead of pure numeric.


"Edward" <nomail (AT) yahoo (DOT) com> wrote

I'm trying to understand and display simple math results, but I get an
unexpected value. Hope this isn't too confusing.
I'd like to add quantities like 2 + 1 + 3 + 0 + 0 to = 6. But instead I
get a result like: 21300

-- I'm trying to get a total number of items ordered using:

var total1=eval(parseInt(f.item1_quan.value*23)) <- how cost total is
var total2=eval(parseInt(f.item2_quan.value*41)) derived for each
item,
var total3=eval(parseInt(f.item3_quan.value*15)) for reference.
Numbers
are
var total6=eval(parseInt(f.item6_quan.value*15)) item prices.
var total7=eval(parseInt(f.item7_quan.value*17))

- I added:
var disc_quan = (f.item1_quan.value + f.item2_quan.value +
f.item3_quan.value + f.item6_quan.value + f.item7_quan.value)

-- I'm displaying the result on my form for this test using:
td colspan="2" align="right"><font face="Verdana" size="2"> Test Quantity
Total</td
td><input type="text" size="7" name="discount_qty" onFocus="this.blur()"
value="0" /></td></tr

-- Legend for this post:
item1_quan: form field name for quantity of item
disc_quan: total quantity of all items, 2+3+1+0+0=6

I hope I have included enough info to make this understandable.

Any suggestions appreciated.