javascript操作html控件实例(javascript添加html)

 _showSchools: function (data) { //data代表是一个数据对象

                var mySelect = document.getElementById("selectSchools"); //获取下拉框                mySelect.options.length = 0;                //将option添加到select标签里面                for (var index in data) {                    var item = data[index];                    var opp = new Option(item.SchoolName, item.name);  //第一个参数代表下拉框显示的内容，第二个代表下拉框选中的内容                    opp.name = "option" + index;                    mySelect.add(opp);                }            },

//下拉列表内容的获取var schoolId = document.getElementById("selectSchools").value;

//我们平时是选中下拉框的值是选中的内容，而不是显示的内容，如何获取显示的内容呢，下面是获取下拉框的选中的显示内容function on_idmbzd_change(){     var sel_obj=document.getElementById("idMbzd");    var index=sel_obj.selectedIndex;    alert(sel_obj.options[index].value);    alert(sel_obj.options[index].text);}

//单选按钮的内容的获取 var chkObjs = document.getElementsByName("radio");                var checkvalue = null;                for (var i = 0; i < chkObjs.length; i++) {                    if (chkObjs[i].checked) {                        checkvalue = parseInt(chkObjs[i].value);                    }                }

//单选按钮的设置if (entity.SelectType == 1) document.getElementById("SelectType").checked = true;if (entity.SelectType == 0) document.getElementById("UnSelectType").checked = true;

//多选框的设置setCheckBox: function (data) {                var courseList = document.getElementsByName("CourseList");                for (var i = 0; i < courseList.length - 1; i++) {                    if (courseList[i].value==data) {                        courseList[i].checked=true;                    }                }

            },