I have a project to do for a client which requires some skill using the Opencart ecommerce software. The version of Opencart that we are using is Opencart 1.5.3.1

The ecommerce store is a tshirt store that sells tshirt designs in multiple colours and sizes. The problem is that we cannot control quantity depending on how many tshirts are available in the selected colour.

We have added colour and size options but we need the colour of the t-shirt selected to then display the sizes available.

This will mean that there will be a select box for colour and a select box for size, so when someone clicks a colour, the next select box will populate the available sizes for that colour.

For example, if someone clicks green, the next select box would populate how many sizes are available for that colour (M, L, XXL) but if someone clicks red, the select box would populate sizes available in red (S, M, XL).

Please only bid if you can do this project! If you have done this before for opencart and have an example, that would be even better!