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);
页面（这里就取一个div做实例）：
<div class="reg_lin1">
<div class="lin1_1">常用邮箱：</div>
<div class="lin1_2"><input type="text" class = "reg_text" id = "email" name = "email"/></div>
<div class="lin1_3"></div>
</div>
<script type="text/javascript">
$("#email").mailAutoComplete({
