js仿QQ邮箱收件人选择与搜索功能

<#--左侧--><div> <label>To:</label> <div id="divtxt" class="mailtxt_div"></div> <input type="hidden" name="messName" id="messName"/> <input type="hidden" name="messId" id="messId"/></div><div> <label>Subject:</label> <input type="text" name="messTitle" id="messTitle"/></div><div> <label>Message:</label> <textarea name="ddContent" id="ddContent"></textarea></div><#--右侧--><div> <input calss="search_mail" type="text" value="Search Contact..." onclick="if(this.value=='Search Contact...')this.value='';" onblur="if(this.value=='')this.value='Search Contact...';" name="txtsearch" /> <div><img src="/images/email03.png" /></div></div><div class="mailclist"> <ul>  <li>   <div class="firstmail" title="Cata food, S.L." alt="aa@qq.com"     ass="Cata food, S.L.">Cata food, S.L.</div>  </li>  <li>   <div class="firstmail" title="Anqing Beverage" alt="bb@qq.com"     ass="Anqing Beverage">Anqing Beverage</div>  </li>  <li>   <div class="firstmail" title="123456ew" alt="cc@qq.com"     ass="123456ew">123456ew</div>  </li> </ul></div>

<script type="text/javascript">$(function(){   //点击收件人列表到收件人  $(".firstmail").bind("click",function(){   var $mailTo=$(this).attr("ass");//收件人名称   var $mailToId=$(this).attr("alt");//收件人Id   var $divtxt_val=$("#divtxt").text();//收件人框中的值   var $messId=$("#messId").val();//隐藏的收件人Id   if($divtxt_val.indexOf($mailTo)<0){//若不存在，则拼接    $("#divtxt").append("<span class='rece' alt='"+$mailToId+";'>"    +$mailTo+";"+"</span>");    $messId=$messId+$mailToId+";";   }   $("#messId").val($messId);   $("#messName").val($("#divtxt").text());//隐藏的收件人名称  });    //点击某个收件人，添加样式   $(".rece").live("click",function(){    $("#divtxt").find(".rece").removeClass("on");    $("#divtxt").find(".rece").css("background-color","").css("color","")    $(this).addClass("on").css("background-color", "#545f59").css("color","#fff");   });    //点击删除键跟退格键，删除对应的收件人  $(document).bind('keydown',  function(event) {    var $messId=$("#messId").val();//收件人Id的值    var $span_alt=$("#divtxt .on").attr("alt");//选中的收件人    if($span_alt != null){    var $index,$span_size,$mess_size,$val;    $index=$messId.indexOf($span_alt);    $span_size=$span_alt.length;    $mess_size=$messId.length;    //删除对应的收件人Id    $val=$messId.substring(0,$index)     +$messId.substring($index+$span_size,$mess_size);    $("#messId").val($val);    if(46==event.keyCode ){ //Delete键         $("#divtxt .on").remove();     $("#messName").val($("#divtxt").text());        }else if(8==event.keyCode){//退格键     $("#divtxt .on").remove();     $("#messName").val($("#divtxt").text());     return false;    }   }    } );  //搜索框搜索事件 $(".search_mail").bind("blur",function(){   var content = $(this).val();   if("Search Contact..." != content && content !=""){    $(".mailclist li div").each(function(){     var name = $(this).text();     if(name.indexOf(content) == -1){      $(this).hide();     }else{      $(this).show();     }    });   } else {    $(".mailclist li div").show();   }  });});</script>