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：
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="https://www.jb51.net/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 type="text" value=""> <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(); $(this).after("<div></div>"); if($("#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><font color='#D33022'>" + press + "</font></div>"; if(!(isEmail(press))){ for(var i=0; i<emailvar.length; i++) { emailtxt = emailtxt + "<div><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><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>