<HTML> <HEAD> <TITLE>Using alert Boxes</TITLE> <SCRIPT LANGUAGE="JavaScript"> <!-- function displayer() { alert("Hello from JavaScript!") } //--> </SCRIPT> </HEAD> <BODY> <H1>Using alert Boxes</H1> <FORM> <INPUT TYPE="BUTTON" ONCLICK="displayer()" VALUE="Click Me!"> </FORM> </BODY> <HTML>