No 'Access-Control-Allow-Origin' header is present on the requested resource

Answer 1

you are trying to perform XMLHttpRequest(AJAX) to another domain.

This is restricted due to security reasons.

for more details see: http://en.wikipedia.org/wiki/Cross-origin_resource_sharing

Answer 2

you are missing semicolon on line:

request.setRequestHeader("Access-Control-Allow-Origin: ", "*")