JavaScript Tutorial/Screen/Resolution
Check screen resolution
<source lang="javascript">
<html> <head> <script language="JavaScript" type = "text/javascript">
</script> </head> <body> </body> </html></source>
<source lang="javascript">
<html> <head> <script language="JavaScript" type = "text/javascript">
</script> </head> <body> </body> </html></source>