本文實例講述了jQuery實現Email郵箱地址自動補全功能代碼。分享給大家供大家參考，具體如下：
jQuery Email郵箱地址自動補全代碼，輸入Email時，會自動加入@符號，在輸入框中輸入“qq”、“Sina”、“163”等等可以看到效果；鼠標經過提示Email時，高亮該條Email，鼠標點擊Email時，文本框內容替換成該條Email，并刪除提示層.
運行效果截圖如下：
在線演示地址如下：
http://demo.VeVB.COm/js/2015/jquery-email-auto-comp-codes/
具體代碼如下：
<!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>輸入Email相關字符自動提示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(){ //文本框獲得焦點，插入Email提示層 $("#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(){ //文本框輸入文字時，顯示Email提示層和常用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(){ //文本框失焦時刪除層 if(can1press){ $("#myemail").remove(); can1press = false; if($("#me").focus()){ can1press = false; } } }) $(".newemail").live("mouseover",function(){ //鼠標經過提示Email時，高亮該條Email $(".newemail").css("background","#FFF"); $(this).css("background","#CACACA"); $(this).focus(); nowid = $(this).index(); }).live("click",function(){ //鼠標點擊Email時，文本框內容替換成該條Email，并刪除提示層 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(); } } })}) //檢查email郵箱function isEmail(str){ if(str.indexOf("@") > 0) { return true; } else { return false; }}</script>在輸入框中輸入“qq”、“Sina”、“163”等等可以看到效果</body></html>希望本文所述對大家jQuery程序設計有所幫助。
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