//车限行
str = prompt('请输入车牌号：')
for (let i=str.length-1;i>=0;i-=1){
if (!isNaN(str[i])){
s(str[i])
break
}
}
function s(m){
let time = new Date()
day = time.getDay()
if (day != 6 && day != 0){
(m == day+5 || m == day)?alert(str+'：该车今天限行'):alert(str+'：该车今天不限行')
}else
alert('今天所有车都不限行')
}
//点名系统
lis = ['1','2','3','4','5','6','7','8','9','10','11','12','13','14']
let con = document.querySelector('#con')
let num = 0
let count = 0
setInterval( () => {
count+=parseInt(Math.random()10)
if (num <= lis.length-1 && count<10){
con.textContent = lis[num]
num = parseInt(Math.random()lis.length)
}
}, 1000)
//苹果香蕉火龙果
<div>苹果<input type="button" value="X" class="button" id="one"/></div>
<div >香蕉<input type="button" value="X" class="button" id="two"/></div>
<div >火龙果<input type="button" value="X" class="button"id="thr"/></div>
<div>西瓜<input type="button" value="X" class="button" id="fou"/></div>
<input type="text" id="keyword">
<input type="button" id="okBtn" value="确定" />
<script type="text/javascript">
let Btn1 = document.querySelector('#one')
Btn1.addEventListener('click', ()=>{Btn1.parentNode.remove()})
let Btn2 = document.querySelector('#two')
Btn2.addEventListener('click', ()=>{Btn2.parentNode.remove()})
let Btn3 = document.querySelector('#thr')
Btn3.addEventListener('click', ()=>{Btn3.parentNode.remove()})
let Btn4 = document.querySelector('#fou')
Btn4.addEventListener('click', ()=>{Btn4.parentNode.remove()})
//伪购物车
<body>
<table>
<tr>
<th><input type="checkbox"/>全选</th><th>商品</th><th>单价</th><th>数量</th><th>小计</th><th>操作</th>
</tr>
<tr>
<td><input type="checkbox"/></td><td>海澜之家修身款</td><td>¥138.00</td><td><button type="button" id="re">-</button> <span id="one">0</span><button type="button" id="add">+</button></td><td><div id='sum'>0</div></td><td><button type="button" class="del">删除</button></td>
</tr>
<tr>
<td><input type="checkbox"/></td><td>海澜之家干净透气款</td><td>¥128.00</td><td>1</td><td>小计</td><td>删除</td>
</tr>
<tr>
<td><input type="checkbox"/></td><td>海澜之家春季新款</td><td>¥99.00</td><td>1</td><td>小计</td><td>删除</td>
</tr>
<tr>
<td colspan="2">删除选中</td><td colspan="3">共计</td><td>结算</td>
</tr>
<script type="text/javascript">
btn1 = document.querySelector('#re')
btn1.addEventListener('click', fun1)
function fun1(){
text = document.querySelector('#one')
sum = document.querySelector('#sum')
num = text.textContent
if (num> 0){
text.textContent = num-1
sum.textContent = ((num - 1)*138.00).toFixed(2)
}
else{
text.textContent = num
sum.textContent = (num*138.00).toFixed(2)
}
}
btn2 = document.querySelector('#add')
btn2.addEventListener('click', fun2)
function fun2(){
text = document.querySelector('#one')
num = parseInt(text.textContent)
text.textContent = num +1
sum.textContent = ((num + 1)*138.00).toFixed(2)
}
btn3 = document.querySelector('.del')
btn3.addEventListener('click', ()=>{btn3.parentNode.parentNode.remove()})
</script>
</table>
</body>