判断两个时间这间间隔几分钟

<script language="javascript" type="text/javascript">
/**
 * 判断两个时间这间间隔几分钟

 * date1与date2格式：yyyyMMddhhmmss ，它们是字符串类型
 * */
function getMinuteInDates(date1,date2){
    var y1=  date1.substr(0,4);
    var y2=  date2.substr(0,4);

    var m1 = date1.substr(4,2);
    var m2= date2.substr(4,2);

    var d1= date1.substr(6,2);
    var d2= date2.substr(6,2);

    var hour1 = date1.substr(8,2);
    var hour2 = date2.substr(8,2);
    var minute1 = date1.substr(10,2);
    var minute2 = date2.substr(10,2);
    var s1 = date1.substr(12,2);
    var s2 = date2.substr(12,2);
    temp1 = y1+"/"+m1+"/"+d1+" "+hour1+":"+minute1+":"+s1;;
    temp2 = y2+"/"+m2+"/"+d2+" "+hour2+":"+minute2+":"+s2;
    var beginDate= new Date(temp1);
    var endDate = new Date(temp2);
   
    var date = endDate.getTime() - beginDate.getTime();
   
    var time = Math.floor(date / (1000 * 60   ));
    return time;
}

//--------------------------------------------------- 

// 日期格式化 

// 格式 YYYY/yyyy/YY/yy 表示年份 

// MM/M 月份 

// W/w 星期 

// dd/DD/d/D 日期 

// hh/HH/h/H 时间 

// mm/m 分钟 

// ss/SS/s/S 秒 

//--------------------------------------------------- 

Date.prototype.format  = function(formatStr)  
{  
    var str = formatStr;  
    var Week = ['日','一','二','三','四','五','六'];  
    str=str.replace(/yyyy|YYYY/,this.getFullYear());  
    str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100));    
    str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth());  
    str=str.replace(/M/g,this.getMonth());  
    str=str.replace(/w|W/g,Week[this.getDay()]); 
    str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());
    str=str.replace(/d|D/g,this.getDate());  
    str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours()); 
    str=str.replace(/h|H/g,this.getHours());  
    str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes());  
    str=str.replace(/m/g,this.getMinutes());  
    str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds());  
    str=str.replace(/s|S/g,this.getSeconds());  
    return str;  
}  

var dt2=new Date().format("yyyyMMddhhmmss");
var st=getMinuteInDates(dt1,dt2);
if(st>60)
{
  alert('回答时间超过60分钟了！');
  return;
}


</script>