How does js get the current year and the current year-1

& lthtml & gt

& ltinput type="text" id="prev " >

& ltinput type = " text " id = " now " & gt

& ltinput type="text" id="next " >

& lt/html & gt；

& ltscript type = " text/JavaScript " & gt；

window.onload = function(){

getYear()；

};

Function getYear(){

Function getEle(id){

Returns document. getelementbyid (id);

}

var inputPrev = getEle("prev ")，

inputNow = getEle("now ")，

inputNext = getEle("next ")，

D = new date (),

now year =+d . get full year()；

inputNow = nowYear

input prev . value = now year- 1；

input next . value = now year+ 1；

}

& lt/script & gt；