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Example of jQuery implementation of mobile phone number input prompt function_jquery

WBOY
WBOYOriginal
2016-05-16 16:01:421303browse

The example in this article describes how jQuery implements the mobile phone number input prompt function. Share it with everyone for your reference. The specific implementation method is as follows: 

<!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>
<title>jQuery手机号码输入提示</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style> 
*{margin:0;padding:0;}
#main{width:728px;height:300px;
padding:60px;margin:0 auto;
border:5px solid #CCC;
}
input{border: 1px solid #666;}
.a{border: 1px solid red;}
.text-magnifier {
background:none repeat scroll 0 0 #FFFFE4;
border:1px solid #E6C99E;
color:#FF4800;
height:50px;
left:170px;
padding:5px 0 0 10px;
position:absolute;
top:30px;
width:200px;
font:20px Tahoma,Helvetica,Arial,Simsun,sans-serif;
}
.text-magnifier .mag-explain {
border-top:1px solid #E6C99E;
color:#6C6C6C;
font-size:12px;
margin-top:5px;
width:190px;
}
.fn-hide{display:none}
</style>
<script type="text/javascript" src="jquery1.3.2.js"></script>
<script>
$(function(){
$("#k").focus(function(evt){
$(this).addClass("a");
if(this.value.length>0){
a(this);
d(this);
}
})
$("#k").keyup(function(evt){
if(this.value.length==0){
e();
}else{
a(this);
}
d(this);
})
$("#k").blur(function(evt){
$(this).removeClass("a");
e();
this.value=this.value
})
})
//计算div的left和top，显示div
function a(evt){
var y = 20;
y = $(evt).outerHeight();
$("#textMag").removeClass("fn-hide");
var t = $(evt).offset().top;
var l = $(evt).offset().left;
$("#textMag").css({
"top": (t+y) + "px",
"left":l + "px"
}); 
}
//隐藏div
function e(){
$("#textMag").addClass("fn-hide")
}
//控制div里显示的数字
function d(e){
var i = e.value;
i=$.trim(i);
var h=i.substring(0,3);
i=i.substring(3);
while(i&&i.length>0){
h+=" "+i.substring(0,4);
i=i.substring(4)
}
$("#mag-text").html(h);
}
</script>
</head>
<body>
<div id="main">
手机号码：
<input type="text" id="k" maxlength="11" class="i-text" value="" />
<div class="text-magnifier fn-hide" id="textMag" >
<div id="mag-text" class="mag-text"></div>
<div class="mag-explain">手机号码是11位数字</div>
<div>http://www.jb51.net/</div>
</body>
</html>

I hope this article will be helpful to everyone’s jQuery programming.

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