refactor bens function

gistfile1.txt

Lexer: function(line) {
        var lex = {
		origLine: line,
		line: line,
		yytext: null,
		token: null,
		check: function(tok) {
			if(tok == this.token) {
				return this.yytext;
			}
		}
		END: "$",
		LIT = "L",
		ID = "I"
	}
	return lex
}