bootstrap multiselect 设置多项被选中方法

console.log("rs", rs);
var arr = rs.split(",");
var sel = document.getElementById("reason");
var len = sel.options.length;
for (var i = 0; i < arr.length; i++) {
$("#reason option[value='" + arr[i] + "'] ").attr("selected", true);
}
$('#reason').multiselect('rebuild');
$('#reason').multiselect('refresh');