JS实现六位字符密码输入器功能

function init(fun){
var that = this;
this.callback = fun;
that.realInput = container.children[0];
that.bogusInput = container.children[1];
that.bogusInputArr = that.bogusInput.children;
that.maxLength = that.bogusInputArr[0].getAttribute("maxlength");
that.realInput.oninput = function(){
that.setValue();
}
that.realInput.onpropertychange = function(){
that.setValue();
}
}

function setValue(){
this.realInput.value = this.realInput.value.replace(/\D/g,"");
console.log(this.realInput.value.replace(/\D/g,""))
var real_str = this.realInput.value;
for(var i = 0 ; i < this.maxLength ; i++){
this.bogusInputArr[i].value = real_str[i]?real_str[i]:"";
}
if(real_str.length >= this.maxLength){
this.realInput.value = real_str.substring(0,6);
this.callback();
}
}

function getBoxInputValue(){
var realValue = "";
for(var i in this.bogusInputArr){
if(!this.bogusInputArr[i].value){
break;
}
realValue += this.bogusInputArr[i].value;
}
return realValue;
}