Ubuntu :: Script To Enable/disable Touchpad?

I am able to get my touchpad to enable disable from the bash shell using

Code:
sudo modprobe -r psmouse with or without the "-r" to turn it on or off, respectively But I wanted to write a script to do this for me because "mouseon" and "mouseoff" is easier for me to remember and more convienient. But I am having some issues (I am a complete newb at scripting, so forgive my ignorance)

the script written is:

Code:
#!/bin/bash
#enable/disable touchpad

sudo modprobe -r psmouse I have saved this script as "mouseoff" in usr/bin (echo $PATH told me this was a directory bash searches, even though it was not a directory and I had to create it with mkdir).

then I did Code: chmod 755 mouseoff However, when I try to run it, I get a "permission denied" error.Can anyone help me with what I am doing wrong?