JS 多邮件验证

1、前端JS代码
/*      receiver-----接收人   */
function foreachEmail(receiver){
        var str="";
        var email ="";
        if(receiver!="" && receiver.indexOf(";")>0)
        {
            var arremail=receiver.split(";");
            for(var i=0;i <arremail.length;i++)
            {
                if(arremail[i].replace(/s+/g,"").search(/^w+((-w+)|(.w+))*@[A-Za-z0-9]+((.|-)[A-Za-z0-9]+)*.[A-Za-z0-9]+$/)==-1)
                {
                    str=str+arremail[i]+"格式错误! ";
                }else{
                    if(i > 0){
                        if(arremail[i] != arremail[i-1]){
                            email = email+";"+arremail[i];
                        }
                    }else{
                        email = arremail[i];
                    }
                }
            }
            receiver = email;
        }else{
            if(receiver.replace(/s+/g,"").search(/^w+((-w+)|(.w+))*@[A-Za-z0-9]+((.|-)[A-Za-z0-9]+)*.[A-Za-z0-9]+$/)==-1)
            {
                str=receiver+"格式错误! ";
            }
        }
        if(str!="")
        {
            $("#alertmsg").html(str);
            return false;
        }
        return receiver;
    }
//当文本框失去焦点时，判断是否输入重复的邮箱输入的话就不显示重复的邮箱
$("#receiver").blur(function(){
        var email = foreachEmail($("#receiver").val().replace(/(^s*)|(s*$)/g,''));
        if(email == false){
            $("#receiver").val("");
        }else{
            $("#receiver").val(email);
        }
 });
function sendEmail(){
    receiver = $("#receiver").val();
    receiver  = foreachEmail(receiver);
    if(receiver   == false){
        return false;
    }
    $.ajax({
        ...                                                                                     //此处略去发送的代码
    });
}
2、后台PHP代码
    可以用explode()方法把取得的邮件字符串分离，代码就不赘述了！！！