项目积累——jQuery

初始化时为文本框赋值，聚焦后清空内容

$(function(){

    $("#buyDate").val("格式：2014-01-01");

    $("#buyDate").css("color","gray");

    $("#buyDate").focus(function(){

       if($("#buyDate").val()=="格式：2014-01-01"){

           $("#buyDate").val("");

           $("#buyDate").css("color","black");

       }

    });

    $("#buyDate").blur(function(){

       if($("#buyDate").val()==""||$("#buyDate").val()==null){

           $("#buyDate").val("格式：2014-01-01");

           $("#buyDate").css("color","gray");

       }

    });

});

创建元素--

//使用Dom标准创建元素

var select = document.createElement("select");

select.options[0] = new Option("加载项1", "value1");

select.options[1] = new Option("加载项2", "value2");

select.size = "2";

var object = testDiv.appendChild(select);

一定不要在页面加载时就改变页面的DOM结构, 比如添加一个元素. 正确的做法是在页面加载完毕后添加或删除元素.

//jQuery 使用动态创建的$(document).ready(function)方法

$(document).ready(

function() { testDiv.innerHTML = "<div style=\"border:solid 1px #FF0000\">使用动态创建的$(document).ready(function)方法</div>"; }

);

或者使用简便语法:

//jQuery 使用$(function)方法

$(

function() { testDiv.innerHTML += "<div style=\"border:solid 1px #FF0000\">使用$(function)方法</div>"; }

);

将JQuery对象转换为DOM对象方法如下：

var $cr=$("#cr");

var cr=$cr[0];

var url = "/cvicdns/cvicdns/htgl/xszzjj.do?operFlag=edit";

showD();

//保存添加的部门

Jquery.post(url,{zzjg_bh:bmbh,zzjg_mc:encodeURIComponent(bmmc)},function(data){

           closeD();

           if(data=="1") {

              alert("保存成功!");

           } else {

              alert(data);

           }

Java文件中：对应encodeURIComponent

if(zzjg_mc != null){

    zzjg_mc = java.net.URLDecoder.decode(zzjg_mc, "UTF-8");

}

//通过JQuery获取值、赋文本值、聚焦

if($(‘#email‘).val() == ""){

    $(‘#msg‘).html("please enter the email!");

    $(‘#email‘).focus;

    return false;

  }

function ajax_post(){

$.post("action.php",{email:$(‘#email‘).val()},

  function(data){

    $(‘#msg‘).html(data);

  },"text");//这里返回的类型有：json,html,xml,text

//

$("#objFlag_" + len + "_").parent().css("display","none");

<tbody class="line" id="data">//和下面的对应

<script type="text/javascript">

                                                    function removeRow(_this){

                                                      var objTR=_this.parentNode.parentNode;

                                                     var rowh = objTR.rowIndex-1; //点击的链接所在行的行号rowh

                                                     var objFlag = $("#objFlag_" + rowh + "_").val();

                                                     if(objFlag != "1"){ // 不是新增加的

                                                        if(confirm("确定要删除此条记录吗？")){

                                                            var zwdhValue = $("#zwdhBefore_" + rowh + "_").val();

                                                            var url = "/cvicdns/rlzygl/zdwh/zwzd.do?operFlag=delete";

                                                            $.post(url,{zwdh:zwdhValue},function(data){

                                                               if(data == "1"){

                                                                   editableTable.removeRow(rowh);//删除一行

                                                                   var arrObjFlag = document.getElementsByName("objFlag");

                                                                   var len = arrObjFlag.length;

                                                                   alert("删除成功！");

                                                               }else if(data == "0"){ // 表示要删除的职务有外键约束，不能删除

                                                                   alert("删除失败，该职务已经被使用！");

                                                               }else{ // 其他异常

                                                                   alert(data);

                                                               }

                                                            });

                                                        }

}else{ // 删除新增加的

editableTable.removeRow(rowh);//删除一行

var arrObjFlag = document.getElementsByName("objFlag");

var len = arrObjFlag.length;

for(var i = 0; i < len; i++){ // 处理行号

    document.getElementById("data").rows[i].cells[0].innerHTML = i + 1;

}

}

}  

</script>

//复选框选中

if($("#bgly_qt").attr("checked")=="checked"){

     $("#qtly").css("display","");

}