自定义设置静态时间变成动态时间

//======================================================================
//函数名称：
//功能说明：构造函数
//输入参数：控件ID
//输出参数：
//======================================================================
function CaClock(spanID){
    //this._spanID = spanID;
    this._intYear;
    this._intMonth;
    this._intDay;
    this._intHours;
    this._intMinutes;
    this._intSeconds;
    this._falg="true";
    this.dateString;
    this.timeString;
this.weekString;
}

//========================================================================
//函数名称：
//功能说明：设置时间秒加1
//输入参数：
//输出参数：
//========================================================================

  CaClock.prototype.increaseSecond=function(){
   this._intSeconds+=1;
 
   this.ComputeDateTime();
   if(this._intMonth<10){
    month = "0"+ this._intMonth+"-"
   }else{
    month = this._intMonth+"-";
   }
   if(this._intDay<10){
    day = "0"+this._intDay+" ";
   }else{
    day = this._intDay+" ";
   }
   if (this._intHours < 10) {
    hours = "0"+this._intHours + ":";
   } else {
    hours = this._intHours + ":";
   }
   if (this._intMinutes < 10) {
    minutes = "0"+this._intMinutes+":";
   } else {
    minutes = this._intMinutes+":";
   }
   if (this._intSeconds < 10) {
    seconds = "0"+this._intSeconds;
   } else {
    seconds = this._intSeconds;
   }
   if(this._intDay<10){
    day = "0"+this._intDay+" ";
   }else{
    day = this._intDay+" ";
   }
    year = this._intYear+"-";
   this.dateString = year+month+day;
   this.timeString = hours+minutes+seconds;
   var days = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
   var dates=this.dateString.split("-");
  
   var da = new Date(dates[0],dates[1]-1,dates[2]);
  //alert(da.getYear()+"-"+da.getMonth()+"-"+da.getDate()+"星期"+da.getDay());
var dayOfWeek = da.getDay();
//alert(dayOfWeek);
this.weekString = days[dayOfWeek];
   //if(this._falg=="true")
   document.getElementById("date").innerHTML=this.dateString+this.timeString+" "+this.weekString;
   window.setTimeout("C.increaseSecond();", 1000);
  }
//========================================================================
//函数名称：
//功能说明：给时间进位
//输入参数：
//输出参数：输出到Span标签
CaClock.prototype.ComputeDateTime=function(){
  if(this._intSeconds==60){
   this._intSeconds=0;
   this._intMinutes+=1;
  } 
  if(this._intMinutes==60){
   this._intMinutes=0;
   this._intHours+=1;
  }
  if(this._intHours==24){
   this._intHours=0;
   this._intDay+=1;
  }
  if(this.judgeMonth()=="February"){
   //判断润年,润年2月为28天
    if(this.judgeYear()){
     if(this._intDay==29){
      this._intDay=1;
      this._intMonth+=1;
     }
    }else{
     if(this._intDay==30){
      this._intDay=1;
      this._intMonth+=1; 
     }
    }
   }
   if(this.judgeMonth()=="bigMonth"){
    if(this._intDay==32){
     this._intDay=1;
     this._intMonth+=1;
    }
   }
   if(this.judgeMonth()=="samllMonth"){
    if(this._intDay==31){
      this._intDay=1;
      this._intMonth+=1;      
     }
     if(this._intDay>30){
      this._intDay=1;
      this._intMonth+=1;
     }
   }
   if(this._intMonth==13){
    this._intMonth=1;
    this._intYear+=1;
   }
}
//========================================================================
//函数名称：
//功能说明：判断年号是润年,平年
//输入参数：
//输出参数：润年(true),平年(false);
//========================================================================
CaClock.prototype.judgeYear=function(){
   if((this._intYear%4==0 && this._intYear%100!=0)||(this._intYear%100==0&&this._intYear%400==0)){
    return true;
   }else{
    return false;
   }
}
//========================================================================
//函数名称：
//功能说明：判断月份大小 ,因2月特殊,所以单独判断
//输入参数：
//输出参数：大月(bigMonth),小月(samllMonth),2月(February)
//========================================================================
CaClock.prototype.judgeMonth=function(){
  if(this._intMonth==1||this._intMonth==3||this._intMonth==5||this._intMonth==7||this._intMonth==8||this._intMonth==10||this._intMonth==12){
   return "bigMonth";
  }
  if(this._intMonth==4||this._intMonth==6||this._intMonth==9||this._intMonth==11){
   return "samllMonth";
  }
  if(this._intMonth==2){
   return "February";
  }

}

//========================================================================
//函数名称：
//功能说明：设置初始值
//输入参数：YYYY-MM-DD HH:MM:SS
//输出参数：
//========================================================================
CaClock.prototype.setInitValue=function(SDateTime){
 
    var strDateTime = SDateTime.split(" ");
    var SDate = strDateTime[0];
    var STime = strDateTime[1];
    var strSplitD = SDate.split("-");
    var strSplitT = STime.split(":");

    this._intYear = strSplitD[0]-0;
    this._intMonth = strSplitD[1]-0;//月加1
    this._intDay = strSplitD[2]-0;
    this._intHours = strSplitT[0]-0;
    this._intMinutes = strSplitT[1]-0;
    this._intSeconds = strSplitT[2]-0;
}

var C = new CaClock("t");
function Start(){
//C. setCurrentTime();
C.increaseSecond();
}
function shows(){
var t=document.getElementById("times").value;
var d=document.getElementById("dates").value.toString();
var timess=""+d+" "+t+"";
C.setInitValue(timess);
Start();
}