cat myscript.sh

#!/bin/sh
echo "hello world"

./myscript.sh
bash: ./myscript.sh: Permission denied

chmod +x ./myscript.sh
./myscript.sh
hello world

#!/bin/bash
#
#
#       Description:    Prints a list of all files it toggled execution flag
#       Changed by:     sea
#       File created:   2012.09.28
#       File changed:   2013.08.26
        script_version=0.3
#
#       Vars
#
        ME=${0##*/}
        ME_DIR=${0##/*}
        help_text="
$ME ($script_version)
ChangeMod [+-]x for files available in \$PWD or \$PATH
Usage:  $ME [/path/to/]FILE
        $ME FILE1 FILE2 FILE3 ...
"
#
#       Action
#
        [ "-h" = "$1" ] && \
                printf "$help_text\n" && \
                exit 1
        for thisFile in "${@}";do
                td=${thisFile##/*}
                script="$thisFile"
                if [ "$td" = "$thisFile" ] && [ ! -f "$thisFile" ]
                then    for tmpPath in $(echo "$PATH"|sed s/':'/' '/g);do
                                [ -f "$tmpPath/$thisFile" ] && \
                                        script="$tmpPath/$thisFile" && \
                                        break
                        done
                else    script="$thisFile"
                fi
                [ -x "$script" ] && \
                        mode="-" || \
                        mode="+"
                [ -f "$script" ] && chmod ${mode}x "$script" && \
                        RET=0 || \
                        RET=1
                [ $RET -eq 0 ] && \
                        printf "Set ${mode}x to $script :)\n" || \
                        printf "Set ${mode}x to $script :(\n"
        done
        exit $RET