I've created a paypal donation button from paypal business account with all default setting. I copy paste the html into my asp.net page, and it looks fine. The problem is when I click on the button simply nothing happen. Is this because I'm still on localhost? Will it be work and go to paypal page when I upload the website?
<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="buttonId">
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
Your asp.net page probably already has a form tag on it and you may have placed the PayPal code inside that form, which won't work. Instead of using the form with the hidden fields that PayPal generated for you, you could just use a link with url parameters. Here's an example (make sure you replace YOUR_BUTTON_ID_HERE with your id):
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=YOUR_BUTTON_ID_HERE">
<img src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" border="0" alt="PayPal - The safer, easier way to pay online!" />
</a>