最近在做通行证项目，里面注册模块有邮箱注册，需求方想要在输入 @ 后触发下拉框显示各个邮箱，效果如下：
html 代码：
<!DOCTYPE HTML> <html lang="en"> <head> <meta charset="utf-8"/> <title>邮箱自动补全</title> <link rel="stylesheet" type="text/css" href="autoComplete.css" media="all"/> </head> <body> <h1>邮箱自动补全 + 上下翻动</h1> <p>当在输入框内输入 @ 时，自动显示各个邮箱的下拉列表。</p> <div class="wrap"> <form action="result.php" method="post"> <input type="text" name="email" id="email" class="inp" autocomplete="off"/><br/><br/> <input type="text" name="other" class="inp" autocomplete="off"/><br/><br/> <input type="submit" value="提交表单" id="submit"/> </form> </div> </body> </html> <script type="text/javascript" src="jquery.min.js"></script> <script type="text/javascript" src="jquery.autoComplete.js"></script> <script type="text/javascript"> $(function(){ $.AutoComplete('#email'); }); </script>
css 代码：
@charset 'utf-8'; .wrap{width:200px;margin:0 auto;} h1{font-size:36px;text-align:center;line-height:60px;} p{font-size:20px;text-align:center;line-height:60px;} .inp{width:190px;border:1px solid #ccc;border-radius:5px;height:30px;line-height:30px;padding:5px;} #AutoComplete{background:#fff;border:1px solid #4190db;display:none;width:200px;} #AutoComplete ul{list-style-type:none;margin:0;padding:0;} #AutoComplete li{color:#333;cursor:pointer;font:12px/22px 5b8b4f53;text-indent:5px;} #AutoComplete .hover{background:#6eb6fe;color:#fff;}
js 代码：
jQuery.AutoComplete = function(selector){ var elt = $(selector); var autoComplete,autoLi; var strHtml = []; strHtml.push('<div class="AutoComplete" id="AutoComplete">'); strHtml.push(' <ul class="AutoComplete_ul">'); strHtml.push(' <li class="AutoComplete_title">请选择邮箱后缀</li>'); strHtml.push(' <li hz="@qq.com"></li>'); strHtml.push(' <li hz="@163.com"></li>'); strHtml.push(' <li hz="@126.com"></li>'); strHtml.push(' <li hz="@sohu.com"></li>'); strHtml.push(' <li hz="@sina.com"></li>'); strHtml.push(' </ul>'); strHtml.push('</div>'); $('body').append(strHtml.join('')); autoComplete = $('#AutoComplete'); autoComplete.data('elt',elt); autoLi = autoComplete.find('li:not(.AutoComplete_title)'); autoLi.mouseover(function(){ $(this).siblings().filter('.hover').removeClass('hover'); $(this).addClass('hover'); }).mouseout(function(){ $(this).removeClass('hover'); }).mousedown(function(){ autoComplete.data('elt').val($(this).text()).change(); autoComplete.hide(); }); //用户名补全+翻动 elt.keyup(function(e){ if(/13|38|40|116/.test(e.keyCode) || this.value == ''){ return false; } var username = this.value; if(username.indexOf('@') == -1){ autoComplete.hide(); return false; } autoLi.each(function(){ this.innerHTML = username.replace(/@+.*/,'') + $(this).attr('hz'); if(this.innerHTML.indexOf(username) >= 0){ $(this).show(); }else{ $(this).hide(); } }).filter('.hover').removeClass('hover'); autoComplete.show().css({ left: $(this).offset().left, top: $(this).offset().top + $(this).outerHeight(true) - 1, position: 'absolute', zIndex: '99999' }); if(autoLi.filter(':visible').length == 0){ autoComplete.hide(); }else{ autoLi.filter(':visible').eq(0).addClass('hover'); } }).keydown(function(e){ if(e.keyCode == 38){ //上 autoLi.filter('.hover').prev().not('.AutoComplete_title').addClass('hover').next().removeClass('hover'); }else if(e.keyCode == 40){ //下 autoLi.filter('.hover').next().addClass('hover').prev().removeClass('hover'); }else if(e.keyCode == 13){ //Enter autoLi.filter('.hover').mousedown(); e.preventDefault(); //如有表单，阻止表单提交 } }).focus(function(){ autoComplete.data('elt',$(this)); }).blur(function(){ autoComplete.hide(); }); }
result.php
<?php echo $_POST['email'] . "<br/>" . $_POST['other']; ?>
demo：点此下载