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object.html
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object.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js对象</title>
</head>
<body>
<p>例1:输入一个日期,告诉你星期几:<input type="date" id="myDate" onchange="showWeekday()"></p>
<p>
例2:选择你要买的水果:
<input type="checkbox" name="fruit" value="苹果">苹果
<input type="checkbox" name="fruit" value="香蕉">香蕉
<input type="checkbox" name="fruit" value="桔子">桔子
<input type="checkbox" name="fruit" value="梨">梨
<input type="checkbox" name="fruit" value="桃">桃
<input type="checkbox" name="fruit" value="西瓜">西瓜
<input type="button" onclick="buy()" value="付款">
</p>
<p>例3:正则验证手机号:<input type="text" id="mobile" onclick="empty()">
<input type="button" onclick="checkMobile()" value="检查手机号">
</p>
<h1 id="p"></h1>
</body>
<script>
function showWeekday(){
var myDate = document.getElementById("myDate").value;
var p = document.getElementById("p");
var weekday = new Date(myDate).getDay();
switch(weekday){
case 1:
p.innerHTML = "今天周一";
break;
case 2:
p.innerHTML = "今天周二";
break;
case 3:
p.innerHTML = "今天周三";
break;
case 4:
p.innerHTML = "今天周四";
break;
case 5:
p.innerHTML = "今天周五";
break;
case 6:
p.innerHTML = "今天周六";
break;
case 0:
p.innerHTML = "今天周日";
break;
}
}
function buy(){
var fruit = document.getElementsByName("fruit");
var buyFruit = [];
for(var i=0;i<fruit.length;i++){
if(fruit[i].checked){
buyFruit.push(fruit[i].value);
}
}
console.log(buyFruit);
var str = "";
for(var i in buyFruit){
str += buyFruit[i]+","
}
document.getElementById("p").innerHTML = "你买了"+str;
}
function checkMobile(){
var mobile = document.getElementById("mobile").value;
var reg = /^1\d{10}$/;
if(!reg.test(mobile)){
document.getElementById("p").innerHTML = "请输入有效手机号!";
}else{
document.getElementById("p").innerHTML = "手机号正确";
}
}
function empty(){
document.getElementById("p").innerHTML = "";
}
</script>
</html>