首页 > 代码库 > 9.22下午 JS\document例题讲解
9.22下午 JS\document例题讲解
作业一：两个列表之间数据从一个列表移动到另一个列表
<div style="width:600px; height:500px; margin-top:20px">
<div style="width:200px; height:300px; float:left">
<select id="list1" size="10" style="width:200px; height:300px">
<option>山东</option>
<option>北京</option>
<option>河北</option>
<option>黑龙江</option>
<option>河南</option>
</select>
</div>
<div style="width:80px; height:300px; float:left">
<input type="button" value="http://www.mamicode.com/单移" id="btn1" style="width:70px; height:30px" onclick="Dan()"/>
<input type="button" value="http://www.mamicode.com/全移" id="btn2" style="width:70px; height:30px" onclick="Duo()"/>
</div>
<div style="width:200px; height:300px; float:left">
<select id="list2" size="10" style="width:200px; height:300px"></select>
</div>
</div>
function Dan()
{
var list1 = document.getElementById("list1"); 把列表1选中值取出
var v = list1.value;
var s = "<option class=‘o2‘>"+v+"</option>"; 造一个option项
var attr = document.getElementsByClassName("o2"); 判断list2里面是否有该项
var cz = true;
for(var i=0;i<attr.length;i++)
{
//alert(attr[i].innerHTML);
if(attr[i].innerHTML==v)
{
cz = false;
break;
}
}
if(cz)
{
var list2 = document.getElementById("list2"); 将option项扔到list2
list2.innerHTML +=s;
}
}
function Duo()
{
document.getElementById("list2").innerHTML = document.getElementById("list1").innerHTML; 直接复制列表选项
}
作业二：日期时间选择
<div style="width:600px; height:100px;">
<select id="year"></select>年
<select id="month" onchange="FillDay()"></select>月
<select id="day"></select>日
</div>
</body>
<script type="text/javascript">
FillYear();
FillMonth();
FillDay();
function FillYear()
{
var sj = new Date();
var nian = sj.getFullYear();
var s = "";
for(var i=nian-5;i<nian+6;i++)
{
if(i==nian)
{
s +="<option selected=‘selected‘>"+i+"</option>";
}
else
{
s +="<option>"+i+"</option>";
}
}
document.getElementById("year").innerHTML = s;
}
function FillMonth()
{
var sj = new Date();
var yue = sj.getMonth()+1;
var s = "";
for(var i=1;i<13;i++)
{
if(i==yue)
{
s +="<option selected=‘selected‘>"+i+"</option>";
}
else
{
s +="<option>"+i+"</option>";
}
}
document.getElementById("month").innerHTML=s;
}
function FillDay()
{
var sj = new Date();
var tian = sj.getDate();
var yue = document.getElementById("month").value; 取月份求天数
var n = 31;
if(yue==4 || yue==6 ||yue==9 ||yue==11)
{
n = 30;
}
else if(yue==2)
{
n=28;
}
var s = ""; 用循环添加
for(var i=1;i<n+1;i++)
{
if(i==tian)
{
s +="<option selected=‘selected‘>"+i+"</option>";
}
else
{
s +="<option>"+i+"</option>";
}
}
document.getElementById("day").innerHTML = s;
}
例题一、子菜单下拉
<style type="text/css">
*{ margin:0px auto; padding:0px}
#menu{ width:700px; height:40px; border:1px solid #999; margin-top:30px}
.list{ width:100px; height:40px; text-align:center; line-height:40px; vertical-align:middle; font-size:16px; font-family:微软雅黑; float:left}
.list:hover{ cursor:pointer; background-color:#63C; color:white}
.ziwai{width:0px; height:0px;position:relative; float:left; top:40px; left:-100px}
.zi{ width:100px; height:100px; background-color:#6C3; display:none }
</style>
</head>
<body>
<div id="menu">
<div class=‘list‘ onm ouseover="Show(‘z1‘)" onm ouseout="YinCang()">首页</div>
<div class="ziwai" >
<div class="zi" id="z1"></div>
</div>
<div class=‘list‘ onm ouseover="Show(‘z2‘)" onm ouseout="YinCang()">产品介绍</div>
<div class="ziwai" >
<div class="zi" id="z2"></div>
</div>
<div class=‘list‘ onm ouseover="Show(‘z3‘)" onm ouseout="YinCang()">公司简介</div>
<div class="ziwai" >
<div class="zi" id="z3"></div>
</div>
<div class=‘list‘ onm ouseover="Show(‘z4‘)" onm ouseout="YinCang()">联系我们</div>
<div class="ziwai" >
<div class="zi" id="z4"></div>
</div>
<div class=‘list‘ onm ouseover="Show(‘z5‘)" onm ouseout="YinCang()">新闻动态</div>
<div class="ziwai" >
<div class="zi" id="z5"></div>
</div>
</div>
</body>
<script type="text/javascript">
function Show(id)
{
var attr = document.getElementsByClassName("zi");
for(var i=0; i<attr.length;i++)
{
attr[i].style.display = "none"; 让所有的子菜单隐藏
}
document.getElementById(id).style.display = "block"; 让和该菜单关联的子菜单显示
}
function YinCang()
{
var attr = document.getElementsByClassName("zi");
for(var i=0; i<attr.length;i++)
{
attr[i].style.display = "none";
}
}
</script>
例题二、用div做下拉列表
<title>无标题文档</title>
<style type="text/css">
*{ margin:0px auto; padding:0px}
#xiala{ width:180px; height:33px; border:1px solid #999;text-align:center; line-height:33px; vertical-align:middle; }
#xiala:hover{ cursor:pointer}
#zi{width:180px; height:150px; border:1px solid #63C; border-top:0px; display:none}
.list{width:180px; height:33px; text-align:center; line-height:33px; vertical-align:middle; border-bottom:1px solid #63C; background-color:#CCC}
.list:hover{ cursor:pointer; background-color:#63C; color:white}
</style>
</head>
<body>
<div style="width:700px; height:500px; margin-top:30px">
<div id="xiala" onclick="Show()"></div>
<div id="zi">
<div class="list" onclick="Xuan(this)">山东</div>
<div class="list" onclick="Xuan(this)">淄博</div>
<div class="list" onclick="Xuan(this)">张店</div>
</div>
</div>
</body>
<script type="text/javascript">
function Show()
{
document.getElementById("zi").style.display="block";
}
function Xuan(ys)
{
var v = ys.innerText;
document.getElementById("xiala").innerText = v;
document.getElementById("zi").style.display="none";
}
</script>
9.22下午 JS\document例题讲解