Email drop-down autofill selection sample code with picture_javascript skills

(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){
$('').appendTo($("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 += '';
}else{
mailHtml += '';
}
});
}
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('')
.before('');
var x = $("#mailListBox_" i), liveValue; //List box object
that.focus(function(){
//Level of parent tag
$ (this).css("color", fc).parent().css("z-index", z);
//Display and hide hint text
if(hint && text){
var focus_v = $.trim($(this).val());
if(focus_v === text){
$(this).val("");
}
}
//Keyboard events
$(this).keyup(function(e){
s = v = $.trim($(this).val());
if (/@/.test(v)){
s = v.replace(/@.*/, "");
}
if(v.length > 0){
//If the key is an up or down key
if(e.keyCode === 38){
//Up
if(index <= 0){
index = newArr.length;
}
index--;
}else if(e.keyCode === 40){
//Down
if(index >= newArr.length - 1){
index = -1;
}
index ;
}else if(e.keyCode === 13){
//Enter
if(index > -1 && index < newArr.length){
//If there is currently an active list
$(this).val($("#mailList_" index).text());
}
}else {
if(/@/.test(v)){
index = -1;
//Get the value after @
//s = v.replace(/@.*/ , "");
//Create a new matching array
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){
//Enter
if(index > -1 && index < newArr.length){
//If there is currently an activation list
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");

});
//Mouse over list item event
//Mouse over
$(".mailHover").live("mouseover", function(){
index = Number($(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);

Custom class display: