abstract:總結(jié):老師,默認(rèn)狀態(tài)下,右上角不顯示數(shù)字,點(diǎn)擊發(fā)布提示發(fā)布成功的。在輸入框內(nèi)刪除一下,右上角數(shù)字變成140,這樣點(diǎn)擊發(fā)布提示請(qǐng)輸入文字!代碼:<!DOCTYPE html><html><head><meta charset="UTF-8"><title>微博輸入數(shù)字</title><style>
總結(jié):老師,默認(rèn)狀態(tài)下,右上角不顯示數(shù)字,點(diǎn)擊發(fā)布提示發(fā)布成功的。在輸入框內(nèi)刪除一下,右上角數(shù)字變成140,這樣點(diǎn)擊發(fā)布提示請(qǐng)輸入文字!
代碼:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>微博輸入數(shù)字</title>
<style>
body{font-size: 12px;}
.box {width: 600px;height: 160px;border: 10px solid pink;margin: 0 auto;padding: 10px;}
img {float: left;}
.box1 {float: left;margin-left: 255px;width: 150px;height: 24px;text-align: right;font-size: 14px;color: #888;}
.box1 span{font-size: 16px;font-weight: bold;}
#text{width: 600px;height: 100px;border: 1px solid #888;margin-top: 5px;}
.box #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{float:left;width: 30px;height:32px;line-height: 32px;padding-left: 26px;}
#sp1{background: url(images/an5.png) no-repeat left center}
#sp2{background: url(images/an4.png) no-repeat left center}
#sp3{background: url(images/an3.png) no-repeat left center}
#sp4{background: url(images/an2.png) no-repeat left center}
#sp5{background: url(images/an1.png) no-repeat left center;width: 40px;}
#sp6{margin-left: 150px;margin-right:15px;color: #888;}
#bt{float:left;width: 80px;height: 30px;border: none;background:#ffc09f;color: #fff;border-radius: 5px;}
</style>
<script text="text/javascript ">
var text,number,m
window.onload=function () {
text=document.getElementById('text')
number=document.getElementById('number')
bt=document.getElementById('bt')
text.onkeyup=function aa(){
m=140-text.value.length
if(m<0){
number.style.color="red"
}else{
number.style.color="#888"
}
number.innerHTML=m;
}
bt.onclick=function() {
if (m==140) {
alert("親,您還沒(méi)有輸入!")
text.focus()
}else if(m<0) {
alert("您輸入的字?jǐn)?shù)過(guò)多了,不可以發(fā)布!")
text.focus()
}else{
alert("發(fā)布成功!")
}
}
aa()
}
</script>
</head>
<body>
<div>
<img src="images/12.png">
<div>還可以輸入<span id="number"></span>文字</div>
<textarea id="text"></textarea>
<span id="sp1">表情</span>
<span id="sp2">圖片</span>
<span id="sp3">視頻</span>
<span id="sp4">話題</span>
<span id="sp5">長(zhǎng)微博</span>
<span id="sp6">公開(kāi)</span>
<input type="button" value="發(fā)布" id="bt">
</div>
</body>
</html>
Correcting teacher:天蓬老師Correction time:2018-12-31 16:14:41
Teacher's summary:提示用戶(hù)字?jǐn)?shù)是對(duì)的,想一下,如何在用戶(hù)輸入的過(guò)程中,實(shí)時(shí)提醒用戶(hù)還能輸入多個(gè)字符呢?