密码强度检测js (转自个人百度空间)

[mishe]

function passwordLevel(str,num) {
  var len=str.length,level,num=num||6;

  if(!/\s/g.test(str)){
  level=passwordFormat(str)
  return level==0?0:(len>=num && level>2)?level:(len>num?level:(level>2?--level:1))
  }
  else{
      return 0
  }

}

function passwordFormat(str){
    var i=0,ret = str.match(/^(\d+|[a-z]+)$|^([a-zA-Z0-9]+)$|^([\w~!@#$%^&*_]+)$/);
  if(ret){
    while (ret[++i] === undefined);
    return i;
  }else{
   return 0
  }
}
console.log(passwordLevel(" "));  //0
console.log(passwordLevel("　13123"));//0
console.log(passwordLevel("123")); //1
console.log(passwordLevel("sss21312"));//2
console.log(passwordLevel("123xx"));//1
console.log(passwordLevel("123xxZ"));//1
console.log(passwordLevel("众收到货"));//0
console.log(passwordLevel("%$#@12"));//3
console.log(passwordLevel("%$#@1"));//2