JavaScript中this与window.event.srcElement在事件处理中的区别详解

fuction method()
{
  alert(this.value);
}
<input type="text" onblur="method()"/>

fuction method(btn)
{
  alert(btn.value);
}
<input type="text" onblur="method(this)"/>

fuction method()
{
  alert(window.event.srcElement.value);
}
<input type="text" onblur="method()"/>

<head>
  <script type="text/javascript">
    function InitEvent() {
      var inputs = document.getElementsByTagName_r("input");
      for (var i = 0; i < inputs.length; i++) {
        inputs[i].onblur = OnblurEvent;
      }
    }
    function OnblurEvent() {
      // OnblurEvent是onblur的响应函数，而不是被响应函数调用的函数
      // 所以可以用this来获取发生事件的对象
      if (this.value.length > 0) {
        this.style.backgroundColor = "white";
      }
      else {
        this.style.backgroundColor = "red";
      }
    }
  </script>
</head>
<body onload="InitEvent()">
  <input id="Text1" type="text" />
  <input id="Text2" type="text" />
  <input id="Text3" type="text" />
</body>
</html>

 <html>
 <title>this与srcElement的区别</title>
 <head>
 <script type="text/javascipt>"
 function btnClick(){
  alert(this.value);
 }
 </script>
 </head>
 <body>
 <input type="button" value="单击" onclick="btnClick()"/>
 </body>
 </html>

 <!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>
   <title>无标题页</title>
   <script type="text/javascript">
   function btnClick(btn){
    alert(btn.value);
   }
   </script>
 </head>
 <body>
 <input type="button" onclick="btnClick(this)" value="单击" />
 
 </body>
 </html>

 <!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>
   <title>无标题页</title>
   <script type="text/javascript">
   function btnClick(){
    alert(window.event.srcElement.value);
   }
   </script>
 </head>
 <body>
 <input type="button" onclick="btnClick()" value="单击" />
 
 </body>
 </html>