大家帮忙，为什么出错，很急该怎么处理

大家帮忙，为什么出错，很急，，
<!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> 无标题文档 </title>
<style type= "text/css ">

</style>
<script language= "javascript ">

/*
* @ function: single line scroll
* @ author:Tom
* @ date: 2007-5-19
*/

/*---------------------------------------*/
function Marquee(w,h)
{
this.container=null;
this.msgBox_1=null;
this.msgBox_2=null;
this._w=w+ "px ";
this._h=h+ "px ";
this.msg_arr=[];
this.msgString= " ";
this.isGo=true;
this.counter=0;
}

Marquee.prototype.push=function(obj)
{
this.msg_arr.push(obj);
}

Marquee.prototype.init=function()
{
for(var i=0;i <this.msg_arr.length;i++)
{
this.msgString+= " <li class=\ "msg\ "> "+this.msg_arr[i]+ " </li> ";
}

this.container=document.createElement( "DIV "); //初始化外层容器
this.container.style.width=this._w;
this.container.style.height=this._h;
this.container.style.verticalAlign= "middle ";
this.container.style.overflowY= "hidden ";

this.msgBox_1=document.createElement( "DIV "); //初始化内层容器
this.msgBox_1.style.width=this._w;
this.msgBox_1.style.verticalAlign= "middle ";
this.msgBox_1.innerHTML=this.msgString;

this.msgBox_2=document.createElement( "DIV ");
this.msgBox_2.style.width=this._w;
this.msgBox_2.style.verticalAlign= "middle ";

this.msgBox_2.innerHTML=this.msgString;

this.container.appendChild(this.msgBox_1);
this.container.appendChild(this.msgBox_2);

var public=document.getElementById( "public ");
public.appendChild(this.container);
this.doScroll();
}

Marquee.prototype.doScroll=function()
{
if(this.isGo)
{
if(this.counter % 50 > = 25)
{
if(this.container.scrollTop-this.msgBox_1.offsetHeight> 0)
{
this.container.scrollTop-=this.msgBox_1.offsetHeight;
}
this.container.scrollTop++;
}
this.counter++;
setTimeout(this.doScroll(),100);
}
}

Marquee.prototype.start=function()
{
this.isGo=true;
}

Marquee.prototype.stop=function()
{
this.isGo=false;
}

window.onload=function()
{
var m=new Marquee(150,25);
m.push( "aaaaaaaaaaaaaaaaaaaaaaaaa ");
m.push( "bbbbbbbbbbbbbbbbbbbbbbbbb ");
m.push( "ccccccccccccccccccccccccc ");
m.init();
}
</script>
</head>

<body>
<table width= "40% " border= "0 " align= "center " cellpadding= "0 " cellspacing= "0 " bgcolor= "#5992DD " style= "border:1px solid #1156BD ">
<tr>
<td width= "48% " height= "25 " bgcolor= "#B5CEF0 "> <strong>   <span class= "fontcolor "> 登录聊天室 </span> </strong> </td>
<td width= "52% " valign= "middle " bgcolor= "#B5CEF0 "> <div id= "public " style= "float:right; vertical-align:middle; "> </div> </td>
</tr>
<tr>
<td colspan= "2 "> <table width= "100% " border= "0 " cellpadding= "0 " cellspacing= "1 " bgcolor= "#FFFFFF ">
<tr>

<td width= "23% " height= "25 " align= "center " bgcolor= "#DAEAF8 "> 昵称 </td>
<td width= "77% " bgcolor= "#DAEAF8 ">  
<input name= "nickname " type= "text " class= "txt " />
  <span id= "nickmsg "> <font color=red> （*必填） </font> </span> </td>
</tr>
<tr>
<td height= "25 " align= "center " bgcolor= "#DAEAF8 "> 密码 </td>
<td height= "25 " bgcolor= "#DAEAF8 ">  
<input name= "password " type= "text " class= "txt " />
  <span id= "pwdmsg "> <font color=red> （*必填） </font> </span> </td>
</tr>
</table> </td>
</tr>
<tr>
<td height= "30 " colspan= "2 " align= "center " bgcolor= "#FFFFFF "> <input type= "submit " name= "Submit " value= "提交 " />
   
<input type= "button " name= "Submit2 " value= "取消 " />
    </td>
</tr>
</table>
</body>
</html>

[解决办法]
应该是循环调用后到导致内存溢出！

改了改，可以用了！

L@_@K

<!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> 无标题文档 </title>
<style type= "text/css ">

</style>
<script language= "javascript ">

/*
* @ function: single line scroll
* @ author:Tom
* @ date: 2007-5-19

*/

/*---------------------------------------*/
function Marquee(w,h)
{
this.container=null;
this.msgBox_1=null;
this.msgBox_2=null;
this._w=w+ "px ";
this._h=h+ "px ";
this.msg_arr=[];
this.msgString= " ";
this.isGo=true;
this.counter=0;
}

Marquee.prototype.push=function(obj)
{
this.msg_arr.push(obj);
}

Marquee.prototype.init=function()
{
for(var i=0;i <this.msg_arr.length;i++)
{
this.msgString+= " <li class=\ "msg\ "> "+this.msg_arr[i]+ " </li> ";
}

this.container=document.createElement( "DIV "); //初始化外层容器
this.container.style.width=this._w;
this.container.style.height=this._h;
this.container.style.verticalAlign= "middle ";
this.container.style.overflowY= "hidden ";

this.msgBox_1=document.createElement( "DIV "); //初始化内层容器
this.msgBox_1.style.width=this._w;
this.msgBox_1.style.verticalAlign= "middle ";
this.msgBox_1.innerHTML=this.msgString;

this.msgBox_2=document.createElement( "DIV ");
this.msgBox_2.style.width=this._w;
this.msgBox_2.style.verticalAlign= "middle ";
this.msgBox_2.innerHTML=this.msgString;

this.container.appendChild(this.msgBox_1);
this.container.appendChild(this.msgBox_2);

var public=document.getElementById( "public ");
public.appendChild(this.container);
}

var marquee;
function fnDoScroll()
{
with(marquee)
{
if(isGo)
{
if(counter % 50 > = 25)
{
if(container.scrollTop-msgBox_1.offsetHeight> 0)
{
container.scrollTop-=msgBox_1.offsetHeight;
}
container.scrollTop++;
}
counter++;
}
}
}

Marquee.prototype.start=function()
{
this.isGo=true;
}

Marquee.prototype.stop=function()
{
this.isGo=false;
}

window.onload=function()
{
var m=new Marquee(150,25);
m.push( "aaaaaaaaaaaaaaaaaaaaaaaaa ");
m.push( "bbbbbbbbbbbbbbbbbbbbbbbbb ");
m.push( "ccccccccccccccccccccccccc ");
m.init();
marquee = m;
window.setInterval(fnDoScroll, 100);
}
</script>
</head>

<body>
<table width= "40% " border= "0 " align= "center " cellpadding= "0 " cellspacing= "0 " bgcolor= "#5992DD " style= "border:1px solid #1156BD ">
<tr>
<td width= "48% " height= "25 " bgcolor= "#B5CEF0 "> <strong>   <span class= "fontcolor "> 登录聊天室 </span> </strong> </td>
<td width= "52% " valign= "middle " bgcolor= "#B5CEF0 "> <div id= "public " style= "float:right; vertical-align:middle; "> </div> </td>
</tr>
<tr>
<td colspan= "2 "> <table width= "100% " border= "0 " cellpadding= "0 " cellspacing= "1 " bgcolor= "#FFFFFF ">

大家帮忙为什么出错很急该怎么处理

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