<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: auto;
padding: 0px;
}
#a1{
width: 1000px;
height: 200px;
border: 1px solid red;
background-color: white;
box-shadow: 8px 8px 8px gray;
margin-top: 10px;
overflow: hidden;
}
#a11{
width: 1000px;
height: 50px;
border: 1px solid red;
line-height: 50px;
}
#a2{
width: 1000px;
height: 50px;
border: 1px solid red;
margin-top: 20px;
}
#a21{
width: 150px;
height: 30px;
margin-top: 20px;
margin-left: 50px;
}
#a4{
width: 1000px;
height: 250px;
border: 1px solid red;
background-color: white;
box-shadow: 8px 8px 8px gray;
margin-top: 10px;
overflow: hidden;
}
#a41{
width: 1000px;
height: 50px;
border: 1px solid red;
line-height: 50px;
}
#a42{
width: 1000px;
height: 50px;
border: 1px solid red;
margin-top: 20px;
}
#a421{
width: 150px;
height: 30px;
margin-top: 20px;
margin-left: 50px;
}
#a43{
width: 1000px;
height: 50px;
border: 1px solid red;
line-height: 50px;
margin-left: 50px;
}
#a44{
width: 1000px;
height: 50px;
border: 1px solid red;
margin-top: 10px;
}
.a441{
width: 50px;
height: 50px;
border: 1px solid red;
background-color: white;
margin-left: 20px;
float: left;
}
#a5{
width: 1000px;
height: 600px;
border: 1px solid red;
background-color: white;
box-shadow: 8px 8px 8px gray;
margin-top: 10px;
overflow: hidden;
}
#a51{
width: 1000px;
height: 50px;
border: 1px solid red;
line-height: 50px;
margin-left: 20px;
}
#a52{
width: 1000px;
height: 50px;
border: 1px solid red;
margin-top: 20px;
margin-left: 20px;
}
#a521{
width: 150px;
height: 30px;
margin-top: 20px;
margin-left: 50px;
}
#a53{
width: 1000px;
height: 50px;
border: 1px solid red;
line-height: 50px;
margin-left: 20px;
}
.a54{
width: 400px;
height: 100px;
border: 1px solid red;
background-color: white;
box-shadow: 8px 8px 8px gray;
margin-top: 20px;
transition: 2s;
}
#a6{
width: 1000px;
height: 200px;
border: 1px solid red;
background-color: white;
box-shadow: 8px 8px 8px gray;
margin-top: 10px;
overflow: hidden;
}
#a61{
width: 1000px;
height: 50px;
border: 1px solid red;
line-height: 50px;
margin-left: 20px;
}
#a62{
width: 1000px;
height: 50px;
border: 1px solid red;
margin-top: 20px;
margin-left: 20px;
}
#a63{
width: 1000px;
height: 50px;
border: 1px solid red;
margin-top: 10px;
margin-left: 20px;
}
</style>
</head>
<body>
<div id="a1">
<div id="a11">
1、while循环
</div>
<div id="a2">
<input type="submit" name="a21" id="a21" value="循环出现提示框5次" onclick="b1()"/>
</div>
</div>
<div id="a4">
<div id="a41">
2、for循环
</div>
<div id="a42">
<input type="submit" name="a421" id="a421" value="批量修改样式" onclick="b2()"/>
</div>
<div id="a43">
固定元素个数
</div>
<div id="a44">
<div class="a441">
</div>
<div class="a441">
</div>
<div class="a441">
</div>
<div class="a441">
</div>
</div>
</div>
<div id="a5">
<div id="a51">
if判断for循环
</div>
<div id="a52">
<input type="submit" name="a521" id="a521" value="批量修改样式" onclick="b3()"/>
</div>
<div id="a53">
元素个数不定
</div>
<div class="a54">
</div>
<div class="a54">
</div>
<div class="a54">
</div>
</div>
<div id="a6">
<div id="a61">
if判断for循环
</div>
<div id="a62">
<input type="checkbox" name="chk" id="1a" value="2" />
<input type="checkbox" name="chk" id="2b" value="3" />
<input type="checkbox" name="chk" id="3c" value="4" />
<input type="checkbox" name="chk" id="4d" value="6" />
<input type="checkbox" name="chk" id="5e" value="5" />
<input type="checkbox" name="chk" id="6f" value="7" />
</div>
<div id="a63">
<input type="submit" name="qx" id="qx" value="全选" onclick="b4()"/>
<input type="submit" name="a632" id="a632" value="不选" onclick="b5()"/>
<input type="submit" name="a633" id="a633" value="反选" onclick="b6()"/>
</div>
</div>
</body>
</html>
<script type="text/javascript">
function b1(){
for(var i= 0;i<5;i++){
alert("这是第"+i+"弹窗")
}
}
function b2(){
var a421 = document.getElementsByClassName("a441");
for(var i = 0;i<a421.length;i++){
a421[i].style.backgroundColor = "yellow"
}
}
function b3(){
var a521 = document.getElementsByClassName("a54");
/*if(a54.style.background == "white"){*/
for (var i =0;i < a521.length ;i++){
a521[i].style.backgroundColor = "yellow";
a521[i].style.height = "100px";
a521[i].style.width = "500px";
}
/*}*/
/*else{
a521[i].style.width = "400px";
a521[i].style.height = "100px";
a521[i].style.background-color = "white";
}*/
}
function b4 (){
var chk = document.getElementsByClassName("chk");
var qx = document.getElementsByClassName("qx");
for(var i = 0;i<chk.length;i++){
if(qx.checked){
chk[i].checked = true;
}
}
}
</script>
JS 20180415作业的相关教程结束。
