On Dec 7, 2009, at 5:02 PM, Skip Evans wrote:

> Hey all,
> I have an HTML field like this
> <input type="text" name="qty[]" value="!!quantity!!" size="4" 
> style="text-align: right;" onblur="calculateBidUnit();">
> ... and what I need to do is pass to the calculateBidUnit function the value 
> of quantity, do a calculation on it and plug into this field.
> <input type="text" name="bid_unit_value[]" value="" size="4">
> Which of course I know how to do for non-array values, but not sure how to 
> get the values to do the calculation on the JS side if the fields are in an 
> array.
> Any help, as always, is greatly appreciated,
> Skip

This question is probably more appropriate for a JS list... but I'm not mean, 
so I'll let you know. The easiest way would be to update the blur event qty 


Now you have the value sent to that function. Another way would be to give your 
input and output an id each - let's say 'qty' and 'bid_unit_value', 
respectively. Then reference those ids in your function. This gives you the 

<input type="text" name="qty[]" value="!!quantity!!" 
onblur="calculateBidUnit();" id="qty" />
<input type="text" name="bid_unit_value[]" value="" id="bid_unit_value" />

<script type="text/javascript">
function calculateBidUnit () {
    var qty = document.getElementById('qty');
    var buv = document.getElementById('bid_unit_value');
    buv.value = qty.value;

I'll give you a small warning. All browsers are not alike, so my recommendation 
would be to use a library that handles the cross-browser compatibility portion 
of javascript (I use Mootools). Nonetheless, the above *should* work. Learning 
the bare bones of javascript will help with the more complicated stuff and 
you'll be smarter for it! =P

Hope that helps,
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