如何在执行期间取得类的实例名称?
<html>    
  <head>  
  <meta   http-equiv= "Content-Type "   content= "text/html;   charset=gb2312 ">  
  <title> 新建网页   1 </title>  
  </head>    
  <body>  
  <script   lang=javascript>  
 var   aaa   =   new   myfunc(); 
 aaa.showtxt();   
 function   myfunc(){ 
       this.showtxt=function(){ 
             document.write( "Please    <span   style= 'cursor:hand '   onclick=\ "aaa.showmsg( 'message! ')\ "> Click   here </span>    to   open   message! "); 
       };   
       this.showmsg=function(msg){ 
             alert(msg); 
       }; 
 } 
  </script>  
  </body>    
  </html>  
 我希望达到的效果是在语句 
 document.write( "Please    <span   style= 'cursor:hand '   onclick=\ "aaa.showmsg( 'message! ')\ "> Click   here </span>    to   open   message! "); 
 中的aaa.showmsg( 'message! ')的aaa这个实例名能通过某种变量或属性动态获得。 
------解决方案--------------------可以设置一个局部变量,指向 对象本身.   
 function myfunc(){ 
 	var self =this; 
 	this.showtxt=function(){ 
 		document.write( "Please  <span id= 'test ' style= 'cursor:hand ' > Click here  </span>  to open message! "); 
 		document.getElementById( 'test ').onclick=function(){self.showmsg( 'message ');}; 
 	};   
 	this.showmsg=function(msg){ 
 		alert(msg); 
 	}; 
 }