I have an image and I want that each time I click on the image, it stores the diamter 0.25cm around the point where it was clicked and stores the coordinates. 

I wrote a different code for this process but it uses asp:Literal plus it is a box and i dont know how to set the diameter so right now it selects the (x,y) coordinates. Also, the asp:literal box is visible to the user when clicking as a gridbox unless it doesnt store the coordinates. I do not want it to be visible. 

Can anyone help with this issue. 

This is my previous code. 

<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <style> .box { border: 1px dotted gray; position: relative; float: left; width: 18px; height: 18px; } .box:hover { border: 1px dotted gray; position: relative; float: left; background-color: aq ...

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