摘要：<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title></title> <style> body{ font-size: 12px; } .box{width: 600px;height: 160px;bor
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></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 #ccc;margin-top: 5px;}
.box #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{float: left;width: 30px;height: 32px;line-height: 32px;padding-left: 26px;}
#sp6{margin-left: 158px;margin-right: 15px;color: #888;}
#bt{float: left;width: 80px;height: 30px;border:none;background: #FFC0CB;color: #fff;}
</style>
</head>
<body>
<div class="box">
<img src="" />
<div class="box1">還可以輸入<span id="number"></span>字 </div>
<textarea id="text"></textarea>
<span id="sp1">表情</span>
<span id="sp1">圖片</span>
<span id="sp1">視頻</span>
<span id="sp1">話題</span>
<span id="sp1">表情</span>
<span id="sp6">公開</span>
<input type="button"value="發(fā)布"id="bt" />
</div>
<script>
var text,number,m=140;
text=document.getElementById('text');
number=document.getElementById('number');
bt=document.getElementById('bt');
number.innerHTML=m
text.onkeyup=function(){
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("輸入");
text.focus()
}
else if(m<0){
alert("太多");
text.focus()
}
else{
alert("成功");
}
}
</script>
</body>
</html>
批改老師：西門大官人批改時(shí)間：2019-04-02 10:18:35
老師總結(jié)：最好上傳一下程序的運(yùn)行效果圖。還有必要的代碼注釋