邮箱下拉自动填充选择示例代码附图

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我是靠谱客的博主活泼歌曲，最近开发中收集的这篇文章主要介绍邮箱下拉自动填充选择示例代码附图，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

1.需要一个js文件：jquery.mailAutoComplete-3.1.js

复制代码代码如下:

 
(function($){ 
$.fn.mailAutoComplete = function(options){ 
var defaults = { 
boxClass: "mailListBox", //外部box样式 
listClass: "mailListDefault", //默认的列表样式 
focusClass: "mailListFocus", //列表选样式中 
markCalss: "mailListHlignt", //高亮样式 
zIndex: 1, 
autoClass: true, //是否使用插件自带class样式 
mailArr: ["qq.com","gmail.com","126.com","163.com","hotmail.com","yahoo.com","yahoo.com.cn","live.com","sohu.com","sina.com"], //邮件数组 
textHint: false, //文字提示的自动显示与隐藏 
hintText: "", 
focusColor: "#333", 
blurColor: "#999" 
}; 
var settings = $.extend({}, defaults, options || {}); 

//页面装载CSS样式 
if(settings.autoClass && $("#mailListAppendCss").size() === 0){ 
$('<style id="mailListAppendCss" type="text/css">.mailListBox{border:1px solid #369; background:#fff; font:12px/20px Arial;}.mailListDefault{padding:0 5px;cursor:pointer;white-space:nowrap;}.mailListFocus{padding:0 5px;cursor:pointer;white-space:nowrap;background:#369;color:white;}.mailListHlignt{color:red;}.mailListFocus .mailListHlignt{color:#fff;}</style>').appendTo($("head")); 
} 
var cb = settings.boxClass, cl = settings.listClass, cf = settings.focusClass, cm = settings.markCalss; //插件的class变量 
var z = settings.zIndex, newArr = mailArr = settings.mailArr, hint = settings.textHint, text = settings.hintText, fc = settings.focusColor, bc = settings.blurColor; 
//创建邮件内部列表内容 
$.createHtml = function(str, arr, cur){ 
var mailHtml = ""; 
if($.isArray(arr)){ 
$.each(arr, function(i, n){ 
if(i === cur){ 
mailHtml += '<div class="mailHover '+cf+'" id="mailList_'+i+'"><span class="'+cm+'">'+str+'</span>@'+arr[i]+'</div>'; 
}else{ 
mailHtml += '<div class="mailHover '+cl+'" id="mailList_'+i+'"><span class="'+cm+'">'+str+'</span>@'+arr[i]+'</div>'; 
} 
}); 
} 
return mailHtml; 
}; 
//一些全局变量 
var index = -1, s; 
$(this).each(function(){ 
var that = $(this), i = $(".justForJs").size(); 
if(i > 0){ //只绑定一个文本框 
return; 
} 
var w = that.outerWidth(), h = that.outerHeight(); //获取当前对象（即文本框）的宽高 
//样式的初始化 
that.wrap('<span style="display:inline-block;position:relative;"></span>') 
.before('<div id="mailListBox_'+i+'" class="justForJs '+cb+'" style="min-width:'+w+'px;_width:'+w+'px;position:absolute;left:-6000px;top:'+h+'px;z-index:'+z+';"></div>'); 
var x = $("#mailListBox_" + i), liveValue; //列表框对象 
that.focus(function(){ 
//父标签的层级 
$(this).css("color", fc).parent().css("z-index", z); 
//提示文字的显示与隐藏 
if(hint && text){ 
var focus_v = $.trim($(this).val()); 
if(focus_v === text){ 
$(this).val(""); 
} 
} 
//键盘事件 
$(this).keyup(function(e){ 
s = v = $.trim($(this).val()); 
if(/@/.test(v)){ 
s = v.replace(/@.*/, ""); 
} 
if(v.length > 0){ 
//如果按键是上下键 
if(e.keyCode === 38){ 
//向上 
if(index <= 0){ 
index = newArr.length; 
} 
index--; 
}else if(e.keyCode === 40){ 
//向下 
if(index >= newArr.length - 1){ 
index = -1; 
} 
index++; 
}else if(e.keyCode === 13){ 
//回车 
if(index > -1 && index < newArr.length){ 
//如果当前有激活列表 
$(this).val($("#mailList_"+index).text()); 
} 
}else{ 
if(/@/.test(v)){ 
index = -1; 
//获得@后面的值 
//s = v.replace(/@.*/, ""); 
//创建新匹配数组 
var site = v.replace(/.*@/, ""); 
newArr = $.map(mailArr, function(n){ 
var reg = new RegExp(site); 
if(reg.test(n)){ 
return n; 
} 
}); 
}else{ 
newArr = mailArr; 
} 
} 
x.html($.createHtml(s, newArr, index)).css("left", 0); 
if(e.keyCode === 13){ 
//回车 
if(index > -1 && index < newArr.length){ 
//如果当前有激活列表 
x.css("left", "-6000px"); 
} 
} 
}else{ 
x.css("left", "-6000px"); 
} 
}).blur(function(){ 
if(hint && text){ 
var blur_v = $.trim($(this).val()); 
if(blur_v === ""){ 
$(this).val(text); 
} 
} 
$(this).css("color", bc).unbind("keyup").parent().css("z-index",0); 
x.css("left", "-6000px"); 

}); 
//鼠标经过列表项事件 
//鼠标经过 
$(".mailHover").live("mouseover", function(){ 
index = Number($(this).attr("id").split("_")[1]); 
liveValue = $("#mailList_"+index).text(); 
x.children("." + cf).removeClass(cf).addClass(cl); 
$(this).addClass(cf).removeClass(cl); 
}); 
}); 

x.bind("mousedown", function(){ 
that.val(liveValue); 
}); 
}); 
}; 

})(jQuery); 

2.jq库当然必不可少了，这里就略了

下面来测试

3.样式表：

复制代码代码如下:

 
<style type="text/css"> 
.out_box{border:1px solid #ccc; background:#fff; font:12px/20px Tahoma;} 
.list_box{border-bottom:1px solid #eee; padding:0 5px; cursor:pointer;} 
.focus_box{background:#f0f3f9;} 
.mark_box{color:#c00;} 
</style> 

4.测试代码

复制代码代码如下:

 
<p>自定义class展示：<input type="text" id="customTest" size="28" /></p> 

<script src="js/jquery-1.6.min.js" type="text/javascript"></script> 
<script src="js/jquery.mailAutoComplete-3.1.js" type="text/javascript"></script> 
<script type="text/javascript"> 
$(function() { 
$("#customTest").mailAutoComplete({ 
boxClass: "out_box", //外部box样式 
listClass: "list_box", //默认的列表样式 
focusClass: "focus_box", //列表选样式中 
markCalss: "mark_box", //高亮样式 
autoClass: false, 
textHint: true, //提示文字自动隐藏 
hintText: "请输入邮箱地址" 
}); 
}) 
</script> 