function show_buy_form(model, price)
{
    var left = ($('#darkbox').width() - $('.bform').width())/2;
    $('#darkbox').css('opacity', '0.7').show().height($('.wrapper').height());
    $('#buy_model').text(model);
    $('#buy_product').val(model);
    $('#buy_price').text(price);
    $('#buy_price_input').val(price);
    $('.bform').show().css('top', $(window).scrollTop()).css('left', left);
    $('#darkbox').click(function(){$('#darkbox,.bform').hide()});
}

$(document).ready(function(){
    $('#buy_form').ajaxForm({
        target: '#thankyou',
        beforeSubmit: function(){ $('#buy_form input,#buy_form textarea').css('opacity', '0.3'); },
        success: function(){ $('#buy_form input,#buy_form textarea').css('opacity', '1'); }
    });
});