話不多說直接上代碼!
//設置disabled屬性(兩種方法)
$('#areaSelect').attr("disabled",true);
$('#areaSelect').attr("disabled","disabled");
//移除disabled屬性(三種方法)
$('#areaSelect').attr("disabled",false);
$('#areaSelect').removeAttr("disabled");
$('#areaSelect').attr("disabled","");