dont understand parts of script need help!

[!bezo!]

the part of the script i dont understand is
Mouse(x,y,10,5,true);//from prince of random's simple chopper.
does this have something to do with co-ordinates for the mouse and if it does how can i set them?

[Arr0w]

Mouse(coordx, corrdyy, Randx, Randy, LEft : boolean)

[!bezo!]

kk thanks arrow and 1 other thing, how do i make the co-ordinates for it to click.
e.g clicking the login button or do i use something else?