正则表达式匹配0-100的两位小数

var pattern = /(^(\d|[1-9]\d)(\.\d{1,2})?$)|(^100$)/,
    str0 = '0', //true
    str1 = '0.1', //true
    str2 = '66', //true
    str3 = '66.6', //true
    str4 = '100', //true
    str5 = '101', //false
    str6 = '-101'; //false
console.log(pattern.test(str));