作业二
作业一
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<select id ="province">
<option value="-1"> 请选择</option>
</select>
<select id="city"></select>
<select id="country"></select>
<script>
var provinceArr=['上海','江苏','河北'];
var cityArr=[
['上海市'],
['苏州市','南京市','扬州市'],
['石家庄','秦皇岛','张家口']
];
var countryArr=[
[ ['黄埔区','静安区','长宁区','浦东区'], ],
[ ['吴中区','姑苏区'], ['玄武区','秦淮区'], ['广陵区','江都区'] ],
[ ['长安区','桥西区'], ['海港区','上海关'], ['桥东区','桥西区'] ]
];
function createOption(obj,date){
for (var i in date){
var op =new Option(date[i],i);
obj.options.add(op)
}
}
var provine=document.getElementById('province');
createOption(province,provinceArr);
var city =document.getElementById('city');
province.onchange=function(){
city.option.length=0;
createOption(city,cityArr[province.value]);
};
var country =document.getElementById('country');
city.onchange=function(){
country.options.length=0;
createOption(country,countryArr[province.value][city.value]);
};
province.onchange=function(){
city.options.length=0;
createOption(city ,cityArr[province.value]);
if (province.value>=0){
city.onchange();
}
else {
country.options.length=0; }
};
</script>
</body>
</html>
作业二
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<script>
var a = [1,2,3,4,2,5,6,2,7,2];
document.write("原数组是：" + a);
var b=[];
document.write("现数组是" );
for(var i=0;i<a.length-1;i++){
if (a[i]!=2){
b[i]=a[i];
}
document.write(b[i]);
}
</script>
</body>
</html>
作业三
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
</style>
</head>
<body>
<div id="joy">
<p>艾欧里亚昂扬不灭</p>
</div>
<button class="haha" onclick="myFunction()">change</button>
<script type="text/javascript">
function myFunction(){
var Color = document.getElementById("joy");
Color.style.border = "3px double red";
}
</script>
</body>
</html>
第一个看书上打的，感觉还可以，第二个自己写的，差不多
第三个不知道写，同学教我的，嘿嘿
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