jquery 獲取多選select的文本中並拼接成字符串

//拼接產品字符串
var productArray = new Array();
$.each($("#fmeatask-subSystem").find("option:selected"), function(index, obj) {
productArray.push($(obj).text());
});
$.each($("#fmeatask-assembly").find("option:selected"), function(index, obj) {
productArray.push($(obj).text());
});

var productStr=productArray.join(",");