How to find various type of co-ordinate in a Web Browser

Find[Set]  x and y Co-ordinate,
#javascript code

Scroll Postion

   var VScrollPos=  document.body.scrollTop;//vertically

   var HScrollPos=  document.body.scrollLeft;//horizontally

Browser width and height

    var wdth=  window.screen.width;

    var hght=  window.screen.height;

Mouse Postion

    var ev=window.event;

    var x=ev.clientX;

    var y=ev.clientY;

Body width and height

     var bHght= document.body.clientHeight;

     var bWdth= document.body.clientWidth;

Set Scroll at stating position

    window.scrollTo(0,0);