/* var shur= prompt('请输入年份');
if(shur % 4 == 0 && shur % 100 != 0 || shur % 400 == 0){
alert(shur);
}
*/
function isruinian(year) {
//如果返回的事ture 否则返回false
var flag = false;
if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
flag = true;
}
return flag;
}
console.log(isruinian(2000));
console.log(isruinian(2001));