1、新建并保存一个html文档,进入html代码编辑页面。
2、写一个input文本输入框,并定义ID,然后写一个按钮,并定义ID。
3、要做的效果就是点击按钮为输入框赋值,然后把输入框和按钮的css样式写好,不写样式也可以。
4、引入jquery文件,路径要正确,写jquery代码,打开浏览器测试一下,点击按钮之后,输入框内就会自动输入赋值的内容。
1、多行文本框就是textarea,它是一个文本输入域,可以无限的输入,它有默认的高度和宽度,textarea是一个双标签。关于用法这里新建一个html文件,写入一个textarea:
2、textarea可以设置列数和行数,通过cols设置列数,通过rows设置行数:
3、打开浏览器,就可以看到设置好的多行文本标签了:
4、最后输入一些文字当文字过多的时候,它不仅可以自动换行,而且在右侧还会自动的显示滚动条。以上就是关于textarea多行文本框的使用介绍:
演示图如下:
用到的是js和正则表达式代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/htmlcharset=utf-8" />
<title>html留言表单验证</title>
<style>
*{margin:0pxpadding:0px}
body{background-color:#f9f9f9}
.clears{ clear:both}
/*messages*/
.messages{padding:15px 0}
.messages input,.messages select,.messages textarea{margin:0padding:0background:noneborder:0font-family:"Microsoft Yahei"}
.messlist {height:30pxmargin-bottom:10px}
.messlist label{float:leftwidth:100pxheight:30pxfont-size:14pxline-height:30pxtext-align:rightpadding-right:10px}
.messlist input{float:leftwidth:300pxheight:28pxpadding-left:5pxborder:#ccc 1px solid}
.messlist.textareas{ height:auto}
.messlist textarea{float:leftwidth:400pxheight:110pxpadding:5pxborder:#ccc 1px solid}
.messlist.yzms input{width:100px}
.messlist.yzms .yzmimg{ float:leftmargin-left:10px}
.messsub{padding:0px 0 0 110px}
.messsub input{width:100pxheight:35pxbackground:#dddfont-size:14pxfont-weight:boldcursor:pointermargin-right:5px}
.messsub input:hover{ background:#f60color:#fff}
#label0{display:nonecolor:#0aa770height:28pxline-height:28px}
#label1{display:nonecolor:#0aa770height:28pxline-height:28px}
#label2{display:nonecolor:#0aa770height:28pxline-height:28px}
#label3{display:nonecolor:#0aa770height:28pxline-height:28px}
#label4{display:nonecolor:#0aa770height:28pxline-height:28px}
#label5{display:nonecolor:#0aa770height:28pxline-height:28px}
#label6{display:nonecolor:#0aa770height:28pxline-height:28px}
#label7{display:nonecolor:#0aa770height:28pxline-height:28px}
#label8{display:nonecolor:#0aa770height:48pxline-height:48px}
#label9{display:nonecolor:#0aa770height:48pxline-height:48px}
#label10{display:nonecolor:#0aa770height:48pxline-height:48px}
</style>
</head>
<body>
<br>
<div class="mail">
<div class="send">
<div class="sendbox">
<form action="#" method="get" class="messages">
<div class="messlist">
<label>姓名</label>
<input type="text" placeholder="姓名" id="input1" onblur="jieshou()"/>
<div id ="label0">*你还没填写名字呢!</div>
<div id ="label1">√正确</div>
<div id ="label2">×错误</div>
<div class="clears"></div>
</div>
<div class="messlist">
<label>电子邮件</label>
<input type="text" placeholder="电子邮件" id="input2" onblur="mailtext()"/>
<div id ="label3">√正确</div>
<div id ="label4">×邮箱地址错误</div>
<div id ="label5">*必填</div>
<div class="clears"></div>
</div>
<div class="messlist">
<label>手机号</label>
<input type="text" placeholder="手机号" id="input3" onblur="phonetext()"/>
<div id ="label6">√正确</div>
<div id ="label7">×手机号码错误</div>
<div class="clears"></div>
</div>
<div class="messlist textareas">
<label>留言内容</label>
<textarea placeholder="说点什么吧..." id="input4" onblur="content()"></textarea>
<div id ="label8">√</div>
<div id ="label9">×</div>
<div id ="label10">* 必填</div>
<div class="clears"></div>
</div>
<div class="messlist yzms">
<label>验证码</label>
<input type="text" placeholder="验证码" id="input5" />
<img src="../images/code.jpg" width="64" height="27" class="yzmimg" />
<div class="clears"></div>
</div>
<div class="messsub">
<input type="submit" value="提交" onclick="send()"style="background:#00a3ebcolor:#fff" />
<input type="reset" value="重填" />
</div>
</form>
<script>
function send(){
var name = document.getElementById("input1").value
var mail = document.getElementById("input2").value
var phone = document.getElementById("input3").value
var content = document.getElementById("input4").value
var code = document.getElementById("input5").value
if(name=="")
{
label2.style.display = 'none'
label1.style.display = 'none'
label0.style.display = 'block'
return false
}
if(mail=="")
{
label3.style.display = 'none'
label4.style.display = 'none'
label5.style.display = 'block'
return false
}
if(content=="")
{
label8.style.display = 'none'
label9.style.display = 'none'
label10.style.display = 'block'//*必填
return false
}
if(code=="")
{
alert('请填写验证码!')
return false
}
else{
alert('信息已发送到站长邮箱,感谢您的支持!')
}
}
</script>
<script>
function jieshou(){
var label1 = document.getElementById("label1")
var label2 = document.getElementById("label2")
var nametext = document.getElementById("input1").value
if(nametext!=""){
label0.style.display = 'none'
label1.style.display = 'block'
label2.style.display = 'none'
}
else{
label0.style.display = 'block'
label1.style.display = 'none'
label2.style.display = 'none'
}
}
</script>
<script>
function mailtext(){
var mailvalue = document.getElementById("input2").value
var mailtext = document.getElementById("input2")
var myreg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/
if(mailvalue!=""){ //邮箱如果非空 显示正确
label5.style.display = 'none'
label3.style.display = 'block'//显示正确
label4.style.display = 'none'
}
else{
label5.style.display = 'block'//显示*必填
label3.style.display = 'none'
label4.style.display = 'none'
return false
}
//上面为一段
if(!myreg.test(mailvalue)){ //既而 正则表达式 验证邮箱 如果不是邮箱地址label4显示出来
label3.style.display = 'none'
label4.style.display = 'block'//*邮箱地址错误
return false
}
else{
label3.style.display = 'block'
label5.style.display = 'none'
label4.style.display = 'none'
}
//上面为一段
}
</script>
<script>
function phonetext(){
var phonetext = document.getElementById("input3").value
if(!(/^1[3|4|5|7|8]\d{9}$/.test(phonetext))){
label6.style.display = 'none'
label7.style.display = 'block'//*手机号码错误
return false
}
else{
label6.style.display = 'block'
label7.style.display = 'none'
}
}
</script>
</script>
<script>
function content(){
var content = document.getElementById("input4").value
if(content!=""){
label8.style.display = 'block'
label9.style.display = 'none'
label10.style.display = 'none'//*必填
return false
}
else{
label8.style.display = 'none'
label9.style.display = 'none'
label10.style.display = 'block'
}
}
</script>
</div>
</div>
</div>
(---------满意采纳奥---------)
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)