HI, I am using a bot program in which i want to find out the link of captcha image so that i can display on a Jframe. When i am looking to page source their is no image link of captcha on it.It is generated on by javascript. Please some body help me.
Thanks in advance.
Why do you want to do this? It is likely that looking at the requirement rather than the technical solution would be the best option here. If you have a bot that wishes to spider information "protected" by a Captcha then contacting the providers and asking for direct access to the data would likely be a much better option that the cat & mouse game you will enter without the providers permission to access said content.
You could use a JavaScript interpreter to run the script. Java 6 comes with one built in or you could embed the complete HTML frame in a browser for the manual part.