jQuery实现Email邮箱地址自动补全功能代码

前端技术 2023/09/09 JavaScript

本文实例讲述了jQuery实现Email邮箱地址自动补全功能代码。分享给大家供大家参考，具体如下：

jQuery Email邮箱地址自动补全代码，输入Email时，会自动加入@符号，在输入框中输入“qq”、“Sina”、“163”等等可以看到效果；鼠标经过提示Email时，高亮该条Email，鼠标点击Email时，文本框内容替换成该条Email，并删除提示层.

运行效果截图如下：

在线演示地址如下：

http://demo.phpstudy.net/js/2015/jquery-email-auto-comp-codes/

具体代码如下：

<!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>
<title>输入Email相关字符自动提示Email地址</title>
<script src=\"jquery-1.6.2.min.js\" type=\"text/javascript\"></script>
<style type=\"text/css\">
body
{
 margin:0px;
 padding:0px;
 font-family:Arial;
 font-size:12px;
 padding:10px;
}
#myemail, .newemail, .newemailtitle{ 
 cursor:default;
 line-height:18px;
}
</style>
</head>
<body>
Email <input id=\"me\" type=\"text\" value=\"\" style=\"width:150px; height:18px; line-height:18px; border:1px solid #999;\">
<script type=\"text/javascript\">
var nowid;
var totalid;
var can1press = false;
var emailafter;
var emailbefor;
$(document).ready(function(){ 
 $(\"#me\").focus(function(){ //文本框获得焦点，插入Email提示层
 $(\"#myemail\").remove();
 $(this).after(\"<div id=\'myemail\' style=\'width:170px; height:auto; background:#fff; color:#6B6B6B; position:absolute; left:\"+$(this).get(0).offsetLeft+\"px; top:\"+($(this).get(0).offsetTop+$(this).height()+2)+\"px; border:1px solid #ccc;z-index:5px; \'></div>\");
 if($(\"#myemail\").html()){
  $(\"#myemail\").css(\"display\",\"block\");
 $(\".newemail\").css(\"width\",$(\"#myemail\").width());
  can1press = true;
 } else {
  $(\"#myemail\").css(\"display\",\"none\");
  can1press = false;
 }  
 }).keyup(function(){ //文本框输入文字时，显示Email提示层和常用Email
  var press = $(\"#me\").val();
  if (press!=\"\" || press!=null){
  var emailtxt = \"\";   
  var emailvar = new Array(\"@163.com\",\"@126.com\",\"@yahoo.com\",\"@qq.com\",\"@sina.com\",\"@gmail.com\",\"@hotmail.com\",\"@foxmail.com\");
  totalid = emailvar.length;
   var emailmy = \"<div class=\'newemail\' style=\'width:170px; color:#6B6B6B; overflow:hidden;\'><font color=\'#D33022\'>\" + press + \"</font></div>\";
   if(!(isEmail(press))){
    for(var i=0; i<emailvar.length; i++) {
     emailtxt = emailtxt + \"<div class=\'newemail\' style=\'width:170px; color:#6B6B6B; overflow:hidden;\'><font color=\'#D33022\'>\" + press + \"</font>\" + emailvar[i] + \"</div>\"
    }
   } else {
    emailbefor = press.split(\"@\")[0];
    emailafter = \"@\" + press.split(\"@\")[1];
    for(var i=0; i<emailvar.length; i++) {
     var theemail = emailvar[i];
     if(theemail.indexOf(emailafter) == 0)
     {
      emailtxt = emailtxt + \"<div class=\'newemail\' style=\'width:170px; color:#6B6B6B; overflow:hidden;\'><font color=\'#D33022\'>\" + emailbefor + \"</font>\" + emailvar[i] + \"</div>\"
     }
    }
   }
   $(\"#myemail\").html(emailmy+emailtxt);
   if($(\"#myemail\").html()){
     $(\"#myemail\").css(\"display\",\"block\");
     $(\".newemail\").css(\"width\",$(\"#myemail\").width());
     can1press = true;
   } else {
     $(\"#myemail\").css(\"display\",\"none\");
     can1press = false;
   }
   beforepress = press;
  }
  if (press==\"\" || press==null){
   $(\"#myemail\").html(\"\");  
   $(\"#myemail\").css(\"display\",\"none\"); 
  }
 })
 $(document).click(function(){ //文本框失焦时删除层
 if(can1press){
   $(\"#myemail\").remove();
   can1press = false;
   if($(\"#me\").focus()){
    can1press = false;
   }
  }
 })
 $(\".newemail\").live(\"mouseover\",function(){ //鼠标经过提示Email时，高亮该条Email
 $(\".newemail\").css(\"background\",\"#FFF\");
 $(this).css(\"background\",\"#CACACA\");
  $(this).focus();
  nowid = $(this).index();
 }).live(\"click\",function(){ //鼠标点击Email时，文本框内容替换成该条Email，并删除提示层
 var newhtml = $(this).html();
 newhtml = newhtml.replace(/<.*?>/g,\"\");
 $(\"#me\").val(newhtml);
 $(\"#myemail\").remove();
 })
 $(document).bind(\"keydown\",function(e)
 {
  if(can1press){
   switch(e.which) 
   {
    case 38:
    if (nowid > 0){
     $(\".newemail\").css(\"background\",\"#FFF\");
     $(\".newemail\").eq(nowid).prev().css(\"background\",\"#CACACA\").focus();
     nowid = nowid-1;
    }
    if(!nowid){
     nowid = 0;
     $(\".newemail\").css(\"background\",\"#FFF\");
     $(\".newemail\").eq(nowid).css(\"background\",\"#CACACA\");  
     $(\".newemail\").eq(nowid).focus();    
    }
    break; 
    case 40:
    if (nowid < totalid){
     $(\".newemail\").css(\"background\",\"#FFF\");
     $(\".newemail\").eq(nowid).next().css(\"background\",\"#CACACA\").focus(); 
     nowid = nowid+1;
    }
    if(!nowid){
     nowid = 0;
     $(\".newemail\").css(\"background\",\"#FFF\");
     $(\".newemail\").eq(nowid).css(\"background\",\"#CACACA\");  
     $(\".newemail\").eq(nowid).focus();    
    }
    break; 
    case 13:
    var newhtml = $(\".newemail\").eq(nowid).html();
    newhtml = newhtml.replace(/<.*?>/g,\"\");
    $(\"#me\").val(newhtml); 
    $(\"#myemail\").remove();
   }
  } 
 })
}) 
//检查email邮箱
function isEmail(str){
 if(str.indexOf(\"@\") > 0) 
 { 
 return true;
 } else {
 return false;
 }
}
</script>
在输入框中输入“qq”、“Sina”、“163”等等可以看到效果
</body>
</html>

希望本文所述对大家jQuery程序设计有所帮助。

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