Marqueetool DHTML application is useful for developers who face the challenge of making image selection and coordinates calculation of selected areas. Or if you want to highlight some areas of your picture (for example point out yourself on the photo). With the help of the marquee tool you can easily focus someone's attention to a specific area on the picture.
The adaptation of tool is not limited in DHTML applications. It can be selection of some area on the picture and further placing other picture on selected area. Or it can be cropping tool for improving composition of your picture or say cropping area on some photo for creating your avatar. With ability of managing several marquees on the same picture you can pick out several areas for further actions. Also you can figure out some use of MarqueeTool yourself.
Thanks to prototype framework and to Sam Stephenson for his clear code.
Tool is the free for use and distribution application and it doesn't require developer permission or approval to use (MIT - licence).