The pageXOffSet property reflects the current horizontal pixel location of the top-left corner of the document.
<html> <head> <script language="JavaScript1.2"> <!-- function showLocation(){ var x = self.pageXOffset; var y = self.pageYOffset var currX = "X-coordinate: " + x + "\n"; var currY = "Y-coordinate: " + y; window.alert(currX + currY); } --> </script> </head> <body> <form> <input type=BUTTON value="Show Location" onClick="showLocation()"> </form> </body> </html>