How can I insert this PayPal BUY Now Button?

[dailce]

Hello I have the following javascript inserted between the "head" of my PHP page. It is used to change and calculate the tax on an order.

 

<script language="javascript">
<!--
var taxp = 0; // tax percent for this order
function Process (obj1) { // process the form, but no submit
 var i,j,bamt,ttax;
   
 bqty = obj1.quantity.value; // selected quantity
 bqty = bqty*1.0; //float that sucker
 bamt = obj1.amount.value * 1.0; //get amount
 
 var ttax = taxp/100.0; // yep - calculate it.
 var unformatted_tax = ttax * bamt;
 var format_tax = fmtPrice(unformatted_tax);
 obj1.tax.value = format_tax;
}
 
function fmtPrice(value) {
 var result = Math.floor(value)+".";
 var cents = 100*(value-Math.floor(value))+0.5;
 result += Math.floor(cents/10);
 result += Math.floor(cents%10);
 return result;
}

function SetTX (obj1) { // Set tax percent for this order
 var pos;
 pos = obj1.selectedIndex; // which item selected
 taxp = obj1.options[pos].value*1.0; // float it
}

//--></script>

 

 

This is my BUY now button code:

 

 <FORM name = "paypal" action="https://www.paypal.com/cgi-bin/webscr/" method="post" onsubmit = "return Process (this);">
                                   <p>
                                     <input type="hidden" name="cmd" value="_xclick">
                                     <input type="hidden" name="business" value="[email protected]">
                                     <input type="hidden" name="item_name" value="XXXXXXXX">
                                     <input type="hidden" name="item_number" value="XXXXXXXX">
                                     <input type="hidden" name="amount" value="79.99">
                                     <input type="hidden" name="shipping" value="8.00">
                                     <INPUT TYPE="hidden" NAME="tax" VALUE="0">
                                     <input type="hidden" name="return" value="http://www.XXXXX.ca/orderpass.htm">
                                     <input type="hidden" name="cancel_return" value="http://www.XXXXX.ca/orderfail.htm">
                                     <input type="hidden" name="currency_code" value="USD">
                                   </p>
                                   <p class="main"><b><font color="FF0000">Select Shipping Location:</font></b>
                                       <select name= "taxer" id = "taxer" onchange = "SetTX (this);">
            <option value="0" selected>U.S.A or International</option>
                                         <option value="15">Ontario (15% GST/PST)</option>
                                         <option value="7">Other Canada (7% GST)</option>
                                         <option value="15">NL, NS, NB (15% HST)</option>
                                       </select>
                                   </p>
                                 <p>
                                   <input name="submit" type="image" src="images/x-click-but23ccc.gif" alt="Make payments with PayPal - it's fast, free and secure!" width="101" height="35" border="0">
                                 </p>
                               </form>

 

 

Baiscally I am trying to create a quick way for the buyer to buy one product. Whenever I click on the buy now button nothing happens it just jumps to the shopping cart page.

 

Also, what code could I use to append the shopping cart items to the item name aboove?

 

Thanks