enter text on summary report with images

enter text on summary report with images

I would like to develop your classic shopping cart experience... on the right side of the screen an iframe with report of all available inventory with pictures, an input for the qty and a custom action to "add to cart"  on the right of the screen an iframe with the contents of your shopping cart.   But Zoho does not allow me to have the user enter a number in the qty field on the left report.   How do I work around this.... any ideas?