JS验证问题

代码如下：<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>添加管理员 </title>
<script src="v.js" type="text/javascript"></script><style type="text/css">

</style>
</head><body>
<form id="form1" name="form1" method="post" action="file:///F|/Demos/checkjsDemo/addAdmin">
<div class="border" style="width:310px;height:170px;">
  <p id="title">添加管理员</p>

  <div id="msgDiv"> </div>
  <table >
     <tr>
      <td>用户名：
      <input name="text" type="text" id="txtUserName" checktype="empty" /> </td>
    </tr>
  </table>
   <input type="submit" name="Submit" value="添加" id="m" />
</div>
</form>
</body>
</html>
js代码如下：function Validater(){
this.pass = true;
var me = this; function isInput(el)
{

var sType = el.type;
var t = 'false';
switch(sType){

case "text":
case "hidden":
case "password":
case "file":
case "textarea":
                t = 'text';
                break;
            case "checkbox":
case "radio":
                t = 'radio';
                break;
case "select-one":
case "select-multiple":
                t = 'select';
                break;
}
return t;
} me.validateEmpty = function(control)
{

   var t = isInput(control);
   if(t == 'text')
   {
           if(typeof(control.value)=="undefined" || control.value == "null")
       {
          me.pass = false;

       }
   }
   //此处的control.type 应该是text啊，为什么是submit ？？？
   document.getElementById("msgDiv").innerText = control.type;


}
function isDisabled(el){

if(el.type=="radio"||el.type=="checkbox"){

var tmpels = document.getElementsByName(el.name);
for(var i=0;i<tmpels.length;i++){
if(tmpels[i].disabled==false){
return false;
}
}
return true;
}else{
return el.disabled;
}
}
me.bandEvent = function(){
    var form = document.form1;
            document.form1.onsubmit = function(){
                if(!me.pass){
                    document.getElementById("msgDiv").innerText ='请输入用户名';
                }
                return me.pass;
            }
    elems = form.elements;
        bandInput(elems);
}
function bandInput(elems){
            for(var i = 0 ; i <elems.length;i++){
                var control = elems[i];
                if(!isDisabled(control)&&isInput(control)!='false')
                {
                    var key = control.getAttribute("checkType");
                    if(typeof(key)!="undefined" && key != null){

                        if(key == "empty")
                        {
                            //此处绑定的方法，control 还是text类型呢。为什么传入参数后成submit类型的了
                            control.onblur = function(){
                                me.validateEmpty(control);

                            }
                        }

                    }
               }
           }

     }

}window.onload = function(){var me = new Validater();me.bandEvent();}为什么一个input text 元素，传入参数后成submit类型的了求解。

解决方案 »

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这一段改成：                        if(key == "empty")
                        {
                            control.onblur = (function(obj){
                                return function(){me.validateEmpty(obj);}
                            })(control);
                        }