想用js显示C# code..?

[html]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
</HEAD><BODY>
<div id="CodeDiv" >
<pre style="font-size:8pt;">
using System;
using System.Web;
using System.Web.UI.WebControl;public override void Page_Load(object sender, System.EventArgs e)
{
//if     4dgff ddddddddddd
// <font >在此处放置用户代码以初始化页面</font>
/* aaa

if(!IsPostBack)
{
base.FileUrl = Request.Url.PathAndQuery;
base.Page_Load(sender,e);
Page.RegisterStartupScript("MaxWin",newcm.MaximizeWin());
GetUserAreas();
ResetImg.Attributes["onclick"] = "document.adminschool.reset();return false;";
SaveImg.Attributes["onclick"] = "return checkSch();";
if(Area_Drop.Items.Count>0)
BindGrid(Area_Drop.SelectedItem.Value,sch_type,ShowSchDg);01代表学校
}
*/

/*
aaa
bb

if 

*/

}
var 
ff array
int

/*ssssssssssssssssssssss
 if 
*/
</pre>
</div>
<textarea id="tx1"   style="width:100%;height:300px;">
</textarea>
</BODY>
</HTML>
[/html]<script language="javascript">
//所有C#关键字
var keyword = ["abstract","as","base","bool","break","byte","case","catch","char","checked","class","const","continue","decimal",
"default","delegate","do","double","else","enum","event","explicit","extern","false","finally","fixed","float","for","foreach","get",
"goto","if","implicit","in","int","interface","interal","is","lock","long","namespace","new","null","object","operator","out","override",
"params","protected","public","readonly","ref","return","sbyte","sealed","set","short","sizeof","stackalloc","static","struct","switch",
"this","throw","true","try","typeof","uint","ulong","unchecked","unsafe","ushort","using","value","virtual","void","while"];function FormatCode()
{
   var obj = document.all.CodeDiv;
   var reg;
   var text = obj.innerHTML;
 
   for (thiskey in keyword)
   {
      reg = new RegExp("\\b("+keyword[thiskey].toString()+"){1}\\b","g");
      text = text.replace(reg,"<font color=blue>$1</font>");
   }
    
    
    text = text.replace(/(\/\/.*)/g,"<font color=green>$1</font>");//.号表示除换行符或其他Unicode中止符之外的所有字符(替换单行注释符)
    
    //var str = "<font color=green>"+RegExp.$1 +"</font>";
    //var str1 = str.replace(/font color=blue/g,"font color=green");
   
    text = text.replace(/\/\/(.)*font color=blue/g,"$1font color=green");
   
    
    
    text = text.replace(str,str1);
    obj.innerHTML = text;
            
    text = text.replace(/(\/\*[\S\s]*\*\/)/g,"<font color=green>$1</font>");//替换多行注释符
    
    
    
    var str = "<font color=green>"+RegExp.$1 +"</font>";
    
    var str1 = str.replace(/font color=blue/g,"font color=green");
    
     
    text = text.replace(str,str1);
   
   document.all.tx1.value +="\n\n\n\n\n\n\n"+ text;
  obj.innerHTML = text;
}
window.onload = FormatCode;
</script>