三、window.onload和$(function(){})的用法

一、打开网页执行一次

   区分jquery的$(function(){})和js的window.onload

window.onload

//js的window.onload的用法（打开网页执行一次）
window.onload=function(){
//获取当前日期
       setInterval(function(){},0)
        var dateTime = new Date();
        var year=dateTime.getFullYear()
        var month=dateTime.getMonth()
        var day=dateTime.getDate()
        month=month+1;
        // var hour = dateTime.getHours();
        // var min = dateTime.getMinutes();
        // var sec = dateTime.getSeconds();
    //     document.getElementById('Newyear').innerHTML="11"+"年";
        document.getElementById('Newyear').innerHTML=year+"年";
        document.getElementById('Newmonth').innerHTML=month+"月";
        document.getElementById('Newday').innerHTML=day+"日";
        

    }
    

 $(function(){})

    //用法
    $(function(){
    //获取当前日期
            var dateTime = new Date();
            var year=dateTime.getFullYear()
            var month=dateTime.getMonth()
            var day=dateTime.getDate()
            month=month+1;
            // var hour = dateTime.getHours();
            // var min = dateTime.getMinutes();
            // var sec = dateTime.getSeconds();
        //     document.getElementById('Newyear').innerHTML="11"+"年";
            document.getElementById('Newyear').innerHTML=year+"年";
            document.getElementById('Newmonth').innerHTML=month+"月";
            document.getElementById('Newday').innerHTML=day+"日";
        
    })