<!DOCTYPE html>
<
html
><
head
>
<
meta
charset
=
"utf-8"
>
<
title
>微博输入</
title
>
<
script
src
=
"https://code.jquery.com/jquery-3.1.1.min.js"
></
script
>
<
style
type
=
"text/css"
>
body {
font-size: 12px;
}
.box {
width: 600px;
height: 160px;
border: 10px solid pink;
margin: 0px 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;
}
#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: 158px;
margin-right: 15px;
color: #888;
}
#bt {
float: left;
width: 80px;
height: 30px;
border: none;
background: #ffc09f;
color: #fff;
border-radius: 5px;
}
</
style
>
<
script
type
=
"text/javascript"
>
/* Jquery版本 */
$('document').ready(function() {
$('#text').keyup(function(){
var len=140- $(this).val().length;
if(len<
0
){
$('#number').css('color','red');
}else{
$('#number').css('color','red');
};
$('#number').html(len);
});
$('#bt').click(function(){
_len
=
140
-$('#text').val().length;
if(_len ==140){
alert('您还没有输入内容');
$('#text').focus();
}else if(_len<0){
alert('字数超出限制,请检查');
$('#text').focus();
}else{
alert('发布成功')
}
});
});
/*
Javascript版本
//var str,num,obj
window.onload
=
function
(){
str
=
document
.getElementById("text");
num
=
document
.getElementById("number");
bt
=
document
.getElementById("bt");
str.onkeyup
=
function
key(){
o
=
140
-str.value.length;
if(o<0){
num.style.color
=
"red"
;
}else{
num.style.color
=
"blue"
;
}
num.innerHTML
=
o
;
}
bt.onclick
=
function
(){
if(o ==140){
alert('请输入内容');
str.focus();
}else if(o<0){
alert('超出规定字符数');
str.focus();
}else{
alert('发布成功')
}
}
}*/
</script>
</
head
>
<
body
>
<
div
class
=
"box"
> <
img
src
=
"images/12.png"
>
<
div
class
=
"box1"
>还可以输入<
span
id
=
"number"
>140</
span
>字</
div
>
<
textarea
id
=
"text"
></
textarea
>
<
span
id
=
"sp1"
>表情</
span
> <
span
id
=
"sp2"
>图片</
span
> <
span
id
=
"sp3"
>视频</
span
> <
span
id
=
"sp4"
>话题</
span
> <
span
id
=
"sp5"
>长微博</
span
> <
span
id
=
"sp6"
>公开</
span
>
<
input
type
=
"button"
value
=
"发布"
id
=
"bt"
>
</
div
>
</
body
>
</
html
>