if {![exists -proc require]} {
	proc require {args} {{done {}}} {
		foreach file $args {
			if {[lsearch -exact $done $file] == -1} {
				uplevel source "/mod/var/mongoose/lib/$file"
				lappend $done $file
			}
		}
	}

	proc header {} {
		uplevel source /mod/var/mongoose/html/lib/header.jim
	}

	proc footer {} {
		uplevel source /mod/var/mongoose/html/lib/footer.jim
	}
}