Pipes.sh gives me errors

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$ sh pipes.sh
: not found: pipes.sh:
pipes.sh: 3: pipes.sh: declare: not found
pipes.sh: 4: pipes.sh: declare: not found
pipes.sh: 5: pipes.sh: declare: not found
pipes.sh: 6: pipes.sh: Syntax error: "(" unexpected
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$bash pipes.sh
pipes.sh: line 2: $'\r': command not found
")syntax error: invalid arithmetic operator (error token is "
")syntax error: invalid arithmetic operator (error token is "
")syntax error: invalid arithmetic operator (error token is "
pipes.sh: line 6: v: readonly variable
pipes.sh: line 10: $'\r': command not found
")syntax error: invalid arithmetic operator (error token is "
pipes.sh: line 13: syntax error near unexpected token `$'in\r''
'ipes.sh: line 13: `case $arg in
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Using Ubuntu 12.10 with gnome-shell

I am sorry, but I do not understand what pipes.sh is.  Could you clarify, and/or post the source of pipes.sh?

Additionally, are you sure you have permission to run the file?

we need to know the source code

Apologies, I'm using this - http://pastebin.com/2PMfGJBM

And yes, I used 'chmod +x' on the file.