NetTalk Central
NetTalk Web Server => Web Server - Ask For Help => Topic started by: johncorry on May 18, 2015, 02:40:44 AM
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I have an image on a form and I want to drop a mark on the image using a mouse click. I have setup the Captcha example source code which is working with BMP images but cant call it from the form. Adding this as a procedure in 'on click' gives page not available. So I have 3 problems seeking advice
1. Is there some way I can call up the captcha source code with a click on the form image.
2. Can I pass the xy cordinates across accurately
3 I cant get FreeImage to compile . Can I use FreeImage in captcha as I would like to work with png files
Thanks
John
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Hi John,
>> 1. Is there some way I can call up the captcha source code with a click on the form image.
The capatcha is just an image. So the form needs to "request the image" - and presumably you would generate it at run time.
The Capatcha example sort of does this already - albeit in that example the image is not "hidden to begin with". But I guess un-hiding the field is the same as for any other field.
>> 2. Can I pass the xy cordinates across accurately
I'm not sure what this means. I think you mean you want to know where the user clicked on the image? You would need to write some JavaScript to do that - or possibly create an ImageMap from the image. Both would require a bit of work on your side.
>> 3 I can't get FreeImage to compile.
more information would be needed to comment. Do you have the FreeImage extension installed? Is the DLL in the app folder?
>> Can I use FreeImage in captcha as I would like to work with png files
yes.
cheers
Bruce