function addToCart( prod_id ) {
	
	var price_id = $(prod_id + '_prices').options[$(prod_id + '_prices').selectedIndex].value;
	var qty = $(prod_id + '_qty').value;
		
	new Ajax.Request( "ajax.php", {
            method: "get",
            parameters: { f: "addItem", id: price_id, q: qty},
            asynchronous: false,
            onSuccess: function(transport){
                if ( transport.responseText.indexOf( "T" ) == 0 ) {
                    var numItems = transport.responseText.split(":");
		    alert("Added to cart!");
		    $('numItems').innerHTML = numItems[1];
                } else {
		    alert("There was a problem adding your item!");
		}
            },
            onFailure: function() {
                alert("There was a problem adding your item!");  
            }
        });
	
}