jquery获取radio，select，checkbox的值-精简版

// 循环获取radio的值

var level_important = 0;
	var list = $("input[type='radio'][name='" + ("radio_level_important_" + id)
			+ "']");
	list.each(function() {
				if ($(this).attr('checked') == "checked") {
					level_important = $(this).val();
				}
			});
	level_important = level_important == 0 ? 2 : level_important;

循环获取checkbox的值

// 删除按钮单击事件
	$("#delete").click(function() {
		var ids = "";
		var list = $("input[type='checkbox'][name='ids']");
		list.each(function() {
					if ($(this).attr('checked') == "checked") {
						ids += $(this).val() + ",";
					}
				});
		if ($.trim(ids)) {
			ids = ids.substring(0, ids.length - 1);
			if (confirm("确定要删除所选择的项次吗？")) {
				location.href = "department!deleteBatch.action?department.code="
						+ ids;
			}
		} else {
			alert("请选择所要操作的项次！");
		}
	});

判断checkbox是否选中

var report_status = $("#chk_report_status_" + id).attr('checked')
			? "Y"
			: "N";

获取select的值

var categories_belong = $("#categories_belong_" + id).val();

or

var categories_belong = $("#categories_belong_" + id).text();