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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Javascript Getting Width and Height of the Screen</title> </head> <body> <script> function getResolution() { alert("Your screen is: " + screen.width + "x" + screen.height); } </script> <button type="button" onclick="getResolution();">Get Resolution</button> </body> </html>