怎么样才可以实现验证成功呢？

怎么操作才可以输入自己规定的验证码才通过，求大家解答。已经苦闷几天了
源代码是这个：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">

<HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>乙天大转盘</TITLE>
<META content="text/html; charset=utf-8" http-equiv=Content-Type>
<SCRIPT type=text/javascript src="乙天大转盘_files/jquery.js"></SCRIPT>

<SCRIPT type=text/javascript>
$(function(){
setInterval("getmessage()",20000);
});

function getmessage()
{
$.ajax({
type:"POST",
url: "getmessage.asp",
success:function(msg){
$("#marqueetext").html(msg);
},
error:function(){
}
});
}

</SCRIPT>
</BODY></HTML>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">

<HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>乙天大转盘</TITLE>

<META content="text/html; charset=utf-8" http-equiv=Content-Type>

<SCRIPT type=text/javascript src="乙天大转盘_files/jquery.js"></SCRIPT>



<STYLE type=text/css>TD IMG {

	DISPLAY: block

}

BODY {

	PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-SIZE: 16px; PADDING-TOP: 0px

}

.huodongBox {

	PADDING-BOTTOM: 15px; LINE-HEIGHT: 30px; PADDING-LEFT: 45px; PADDING-RIGHT: 45px; FONT-FAMILY: Arial, Helvetica, sans-serif; BACKGROUND: url(image/webSkin/1_r8_c1.jpg) repeat-y; COLOR: #ffffff; PADDING-TOP: 15px

}

</STYLE>



<META name=GENERATOR content="MSHTML 8.00.6001.23067"></HEAD>

<BODY>

<TABLE border=0 cellSpacing=0 cellPadding=0 width=1000 align=center>

  <TBODY>

  <TR>

    <TD><IMG src="乙天大转盘_files/1_r1_c1.jpg" width=1000 height=87></TD></TR>

  <TR>

    <TD><IMG id=n1_r2_c1 border=0 name=n1_r2_c1 alt="" 

      src="乙天大转盘_files/1_r2_c1.jpg" width=1000 height=28></TD></TR>

  <TR>

    <TD>

      <TABLE border=0 cellSpacing=0 cellPadding=0 width="100%" align=left>

        <TBODY>

        <TR>

          <TD height=489 background=乙天大转盘_files/1_r3_c1.jpg width=629 

          align=middle>

            <OBJECT id=turnplate 

            codeBase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" 

            classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 width=480 

            height=480><PARAM NAME="allowScriptAccess" VALUE="always"><PARAM NAME="FlashVars" VALUE="fvar=&tips="><PARAM NAME="movie" VALUE="turnplate.swf"><PARAM NAME="menu" VALUE="false"><PARAM NAME="quality" VALUE="high"><PARAM NAME="wmode" VALUE="transparent">

                                                                                 

                                         <embed src="turnplate.swf" 

            FlashVars="fvar=&tips=" id="FlashVars" width="480" height="480" 

            quality="high" id="turnplate" name="turnplate" wmode="transparent" 

            allowScriptAccess="always" 

            pluginspage="http://www.macromedia.com/go/getflashplayer" 

            type="application/x-shockwave-flash" />            </OBJECT></TD>

          <TD>

            <TABLE border=0 cellSpacing=0 cellPadding=0 width=371 align=left>

<SCRIPT type=text/javascript>

$(function(){   

   setInterval("getmessage()",20000); 

}); 



function getmessage()

{

	$.ajax({

	type:"POST",

	url: "getmessage.asp",

	success:function(msg){		

		$("#marqueetext").html(msg);	

	},

	error:function(){

	}

	});

}





</SCRIPT>

</BODY></HTML>

javascript 验证码 object --------------------编程问答--------------------

老是这样！！！ --------------------编程问答-------------------- 没怎么看你的代码，我记得以前写过。
1、先在后台随机生成验证码
2、保存并传递给前端视图，视图处理下，显示出来(生成图片)
3、验证输入的验证码与生成的是否一致，不一致再重复第一步。 --------------------编程问答--------------------

补充：.NET技术 ,  .NET Framework