// JavaScript Document

var isIE = document.all;
var mouseX = 0;
var mouseY = 0;

function setMouseXY(e,imx,imy)
{ 	
  if (!e) e = window.event;
  if (e)
  { 
  	mouseX = isIE ? (e.clientX + document.body.scrollLeft) : e.pageX;
  	mouseY = isIE ? (e.clientY + document.body.scrollTop) : e.pageY;
  }
  if(isNaN(imx)) 
  { 
  alert('!!'); 
  imx = document.getElementById.('imgtag').x;
  }
  if(isNaN(imy)) { imx = document.getElementById.('imgtag').y; }
  document.getElementById('fsx').value = mouseX-imx;
  document.getElementById('fsy').value = mouseY-imy;
  alert(mouseX+':'+mouseY);
}