X-Cart forums - Changing quantity on the fly

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- Changing design (https://forum.x-cart.com/forumdisplay.php?f=51)

- - Changing quantity on the fly (https://forum.x-cart.com/showthread.php?t=73724)

Changing quantity on the fly

This cant be too difficult I am sure all I need is an element id.

I need to change the product quantity using the validation script, my customers need to order products in a bank (h x w), that's easy just by adding the options, then using validation I want to change the quantity for example 3h x 4w = 12 units so I need to change the quantity to 12.

using xcart 4.66 ,

Re: Changing quantity on the fly

Ive done this now with the following

Code:

var value = parseInt(product_option_value("MUH"));



var value2 = parseInt(product_option_value("MUW"));



var newquant = (value * value2);



document.getElementById("product_avail").value = newquant ;



var qtybox = parseInt(document.getElementById("product_avail").value);



if (  qtybox !== newquant) {



alert("Sorry, the quantity does not match the mailbox bank sizer ytybox " + qtybox + "newquant " + newquant);



return false;



}

the problem with this is it only changes the quantity when the add to cart button is pressed thus calling the checkoptions routine,

can I call the routine when either of the dropdowns are changed and if so how and where should I put the code.:mad:

Re: Changing quantity on the fly

You should add the routine as a function and then use the "onchange" event to call it every time the dropboxes change.

If your sites uses jQuery you can add the handler to the dropboxes with this:
https://api.jquery.com/change/