function epaper_apply(ndo)
 { 	   	 	 	   
  	 var xemail = document.getElementById("txx_epaper").value;  	  
  	 
  	 if (xemail==''){
  	 	  alert("請輸入E-Mail!");
  	 	  //return (false);
     } 
     else{
     	   var filter=/^.+@.+\..{2,3}$/
	       if (!(filter.test(xemail))){
	       	  errmsg = "電子信箱輸入格式錯誤 !!";	 
	       	  alert(errmsg);	       	  
	          //return (false);	        	
	       }	  
	       else{
	       	    var httpObject = createXMLHttpRequest();     // XMLHttpRequest Object  	        	      
              var strUrl = "" ;
              var strA   = "";
              var xselTxt ="";                    
              strUrl = "js/chk_epaper.php" ;                     
              strUrl += "?ml=" + encodeURIComponent(xemail)+'&do='+ndo;
              
              // alert(strUrl)
              
              httpObject.open("GET",strUrl,false);    //true:非同步  flase:同步
              
              httpObject.setRequestHeader("Content-Length",strA.length); 
              httpObject.setRequestHeader("CONTENT-TYPE","application/x-www-form-urlencoded");     
              httpObject.setRequestHeader("charset", "utf-8");                   
              
              httpObject.send(strUrl);
              
              var xxchk = httpObject.responseText;
              //alert(xxchk);   
              switch(xxchk)
              {
              case 'no_add':
                alert("此E-mail 已經訂閱過囉!!");
                break;
              case 'ok_cancel':
                alert("已取消訂閱電子報!");
                break;
              case 'ok_add':
                alert("電子報訂閱成功~!");
                break;
              case 'no_cancel':
                alert("此E-mail尚未訂閱電子報!");
                break;        
              }	       	
	      }     
     }
  	  	 
 }