Sublime Text
<!DOCTYPE html> <html> <body> <script> var text = "Tai lieu hoc JavaScript"; var a = text.toLowerCase(); document.write(a); </script> <hr> <script> var b = "JavaScript".toLowerCase(); document.write(b); </script> </body> </html>
<!DOCTYPE html> <html> <body> <script> var text = "Tai lieu hoc JavaScript"; var a = text.toLowerCase(); document.write(a); </script> <hr> <script> var b = "JavaScript".toLowerCase(); document.write(b); </script> </body> </html>