У вашего броузера проблема в совместимости с HTML5
This video shows a demonstration of sending sms using GSM modem interfaced with Arduino UNO. SIM900 GSM/GPRS module is used in this project for sending sms using Arduino UNO.
Blog Link for code and schematic:
http://letsplaywitharduino.blogspot.in/p/gsm-modem-with-arduino-uno.html