Get javascript value without html or script tags

Question

I'm trying to get a product id value inside a add to cart button. The below code works getting the value in an alert.

<script type="text/javascript">
jQuery(document).ready(function(e) {
    jQuery('#getChkBoxValues').click(function(){
        var chkBoxArray = [];
    jQuery('.checkbox-id:checked').each(function() {
            chkBoxArray.push(jQuery(this).val());
        });
    alert(chkBoxArray);
    });
});
</script>
<input type="button" value="Get Values" id="getChkBoxValues" />

Is there any way to get the value inside this button (below) where the number 5 is without any additional span, div, or script tags?

 <button id="product-addtocart-button" class="button btn-cart" onclick="location.href='<?php echo Mage::getStoreConfig(Mage_Core_Model_Store::XML_PATH_SECURE_BASE_URL); ?>checkout/cart/add?product=5&qty=1'"><span><span><?php echo $this->__('Add All to Cart') ?></span></span></button>

Answer 1

You ca get the product id by this code

<button id="product-addtocart-button" class="button btn-cart" onclick="location.href='<?php echo Mage::getStoreConfig(Mage_Core_Model_Store::XML_PATH_SECURE_BASE_URL); ?>checkout/cart/add?product=<?php echo $_product->getId() ?>&qty=1'"><span><span><?php echo $this->__('Add All to Cart') ?></span></span></button>