easyui datebox只显示年月

$("#beginMonth").datebox({
formatter: function(date) {
debugger;
var y = date.getFullYear();
var m = date.getMonth() + 1;
return y + '-' + (m < 10 ? ('0' + m) : m);
},
parser: function(s) {
debugger;
if (!s) {
return new Date();
}
var ss = s.split('-');
var y = parseInt(ss[0], 10);
var m = parseInt(ss[1], 10);
if (!isNaN(y) && !isNaN(m)) {
return new Date(y, m - 1);
} else {
return new Date();
}
}
});