Hi,
We often see some web pages that present some kind of numbers or letters, with some noise added to it, and ask the users to write what they see in a text box.
The usage is to eliminate, as far as possible, some kind of auto-input data to the web pages.
Is there a generic name for that, that I can use to google it?
Anyone have any info on how can I use such feature in JSP pages? I mean, there must be some code behind generating the picture to be displayed (I think).
Thank you.
We often see some web pages that present some kind of numbers or letters, with some noise added to it, and ask the users to write what they see in a text box.
The usage is to eliminate, as far as possible, some kind of auto-input data to the web pages.
Is there a generic name for that, that I can use to google it?
Anyone have any info on how can I use such feature in JSP pages? I mean, there must be some code behind generating the picture to be displayed (I think).
Thank you.
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