<html> <head> <title>Mouse Demo</title> <script> function up() { document.frm1.b1.value="Mouse up"; } function down() { document.frm1.b1.value="Mouse down"; } </script> </head> <body> <form name="frm1"> <input type="button" name="b1" value="click" onmouseup="up()" onmousedown="down()"> </form> </body> </html>