JavaScript Programming JavaScript > Code Examples Window screen Left Window screen Left <html> <head> <title>Happy Codings :-) JavaScript Code Examples</title> </head> <body> <script language="JavaScript"> function function1() { var m = "" m = "The left coordinate is: " + window.screenLeft + "\n"; m += "The top coordinate is: " + window.screenTop + "\n"; alert(m); } </script> <body bottommargin="150"> <input type="button" value="Extract the coordinates" onclick="function1();"> </body> </html>