# by Kris
if [[ $# -gt 0 ]]; then
	for ele in `echo "$@"`; do
		IFS='='
		opt=(${ele})
		# +option, sign, value
		if [[ "${opt[0]:0:1}" == "+" ]]; then
				eval ${opt[0]:1}="${ele}"
				eval ${opt[0]:1}S="+"
			if [[ "${opt[1]}" == "" ]]; then
				eval ${opt[0]:1}V=""
			else
				eval ${opt[0]:1}V="${opt[1]}"
			fi
		# -option, sign, value
		elif [[ "${opt[0]:0:1}" == "-" ]]; then
				eval ${opt[0]:1}="${ele}"
				eval ${opt[0]:1}S="-"
			if [[ "${opt[1]}" == "" ]]; then
				eval ${opt[0]:1}V=""
			else
				eval ${opt[0]:1}V="${opt[1]}"
			fi
		fi
	done
	unset IFS
fi