Php or javascript download file

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I have a description page for a product so the only thing i am doing is adding the totals when someone adds to cart. The add to cart function is simply a print to tab function the tab is simply called back when this person clicks on the checkout link.

1.button that transports the page number to the tab.
2.everything in tab is added together to make a total automatically.
3.recall tab is to recall the total and the item name.
4.other words recall tab recalls the total and the name.

the way to define tab is that tab is considered checkout .

Skills required:
HTML, Java, Javascript, Perl, PHP
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