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Addi +/- buttons for quantity


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If you're looking at the source code, you can see the following snippet (for the + button):

 

<img src="path/plus.gif" alt="Increase" onclick="this.parentNode.getElementsByTagName('input')[0].value = (+this.parentNode.getElementsByTagName('input')[0].value + 1)" />

 

So it's quite simple: in the file shop/themes/yourTheme/product.tpl add the graphic of your choice and bind some JavaScript code on it. When the user clicks on the graphic, increment the value of the quantity input field.

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