数组遍历判断两个输入框之间是否有输入重复的值！

1数组遍历判断两个输入框之间是否有输入重复的值！
今天在工作的过程，遇到一个这样的问题。有两个输入框，
用户可输入多值，用逗号隔开，例如：1，2，3，4
第二个输入框也是一样，但是第一输入框是必填的，现在就是要取这两个输入框逗号隔开的值而且不能重复。
以下为我实现的脚本代码，欢迎指正。

function checkSend()
{
    var Accept = document.getElementById("txtAddresseeName").value;
    if( Accept=="")
    {
        alert("请输入");
        return false;
    }
       if(  CheckAcceptName(Accept,"第一个框") )
    {   
        if(document.getElementById("txtOthersName")!=null)
        {
           var CopyForName = document.getElementById("txtOthersName").value;  
            if( CopyForName !="")
            {
                  if( CheckAcceptName(CopyForName,"第二个框"))  
                  {
                          var ErrorMsg="";    
                           if(Accept.substring(Accept.length-1,Accept.length)==",") 
                                 Accept=Accept.substr(0,   Accept.length-1);   //去掉最后一个逗号 
                           var Accepts = Accept.split(","); //将逗号拆分
                           for(var i=0;i<Accepts.length;i++)
                           {
                                AcceptName = Accepts[i];   
                                if( AcceptName!="")
                                {
                                    var count = 0;
                                     if(CopyForName.substring(CopyForName.length-1,CopyForName.length)==",") 
                                            CopyForName=CopyForName.substr(0,   CopyForName.length-1);   //去掉最后一个逗号 
                                    var CopyForNames = CopyForName.split(","); //将逗号拆分
                                    for(var j=0;j<CopyForNames.length;j++)
                                    {
                                        if( AcceptName == CopyForNames[j] )
                                            count ++ ;  
                                    }
                                    
                                    if( count > 0 ) //如果重复
                                    {
                                        if( ErrorMsg.indexOf(AcceptName) == -1) //添加错误提示
                                             ErrorMsg = ErrorMsg +AcceptName +",";
                                    }
                                }
                           }
                           
                           if(  ErrorMsg !="")
                           {
                                alert("第一个输入框和第二个框中"+ErrorMsg+"出现重复。");
                                return false;
                           }

                   }
             }
        }
    }
       
  
    return true;
}

//2008.08.07 
//阿一  检查两个输入框是否出现重复
function CheckAcceptName(AcceptName,type)
{

    var ErrorMsg="";    
   if(AcceptName.substring(AcceptName.length-1,AcceptName.length)==",") 
         AcceptName=AcceptName.substr(0,   AcceptName.length-1);   //去掉最后一个逗号 
   var Accepts = AcceptName.split(","); //将逗号拆分
   for(var i=0;i<Accepts.length;i++)
   {
        Name = Accepts[i];   
       if( Name!="")
        {
            var count = 0;
            for(var j=0;j<Accepts.length;j++)
            {
                if( Name == Accepts[j] )
                    count ++ ;  //判断某值在该数组中是否出现重复
            }
            
            if( count > 1 ) //如果重复
            {
                if( ErrorMsg.indexOf(Name) == -1) //添加错误提示
                     ErrorMsg = ErrorMsg +Name +",";
            }
        }
   }
   
   if(  ErrorMsg !="")
   {
        alert(type+ErrorMsg+"出现重复。");
        return false;
   }
   
   return true;
}