You can store them in form fields

x = y =

or as plain text

Add this to a file called mousePosition.js:

  /* JavaScripts.com http://javascripts.com
  Created by: Roy Marchand | http://www.expertsrt.com */
  function showit() {
    document.forms['theform'].xcoord.value=event.x;
    document.getElementById('spanx').innerHTML='x = '+event.x;
    document.forms.theform.ycoord.value=event.y;
    document.getElementById('spany').innerHTML='y = '+event.y;
  }
  
  function showitMOZ(e) {
    document.forms['theform'].xcoord.value=e.pageX;
    document.getElementById('spanx').innerHTML='x = '+e.pageX;
    document.getElementById('spany').innerHTML='y = '+e.pageY;
    document.forms.theform.ycoord.value=e.pageY;
  }
  
  if (!document.all) {
    window.captureEvents(Event.CLICK);
    window.onclick=showitMOZ;
  } else {
    document.onclick=showit;
  }

Add this to the <head> portion if your page:

  <script type="text/javascript" src="mousePosition.js"></script>

Add this in the <body> where you want the fields to appear:

  <h4>You can store them in form fields</h4>
  <form name="theform">
  x = <input name="xcoord" type="text" readonly size="5"> 
  y = <input name="ycoord" type="text" readonly size="5">
  </form>
  <p>
  <h4>or as plain text</h4>
  <span id="spanx"> </span> <span id="spany"> </span>

Good Luck!