<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<style type="text/css">
#box{
border: 1px solid lightgray;
width: 250px;
height: 40px;
/*line-height: 40px;*/
}
#box>img{
width: 40px;
height: 40px;
border-right: 1px solid lightgray;
}
#box>input{
border: 0;
outline:0;
height: 38px;
width: 150px;
vertical-align: top;
/*background-color: chartreuse;*/
}
#box>font{
float: right;
height: 40px;
line-height: 40px;
margin-right: 10px;
color: lightgray;
font-size: 20px;
display: none;
cursor: pointer;
}
</style>
</head>
<body>
<div id="box">
<img src="img/username.png"/>
<input placeholder="请输入账号"/>
<font>×</font>
</div>
<script type="text/javascript">
$('#box>input').on('keyup',function(){
if($(this).val().length == 0){
$('#box>font').css('display', 'none')
}else{
$('#box>font').css('display', 'inline')
}
})
$('#box>font').on('click', function(){
$('#box>input').val('')
$('#box>font').css('display', 'none')
})
</script>
</body>
</html>
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