对textarea框的代码调试，而且功能上使用非常方便，酷
</head>
<body >
<script>function jm_cc(ob){
ob.select();js=ob.createtextrange();js.execcommand("copy");
}</script>
<table cellspacing=0 cellpadding=0 width="99%" border=0>
<tbody>
<tr>
<td align=middle width="100%">代码说明</td></tr>
<tr>
<td align=middle width="100%"></td></tr></tbody></table>
<form action=--webbot-self---------------- method=post>
<div align=center>
<center><textarea name=txt rows=20 cols=65></textarea></center><br></div>
<center><table cellspacing=0 cellpadding=0 border=0>
<tbody>
<tr bgcolor=#f0fff0>
<td align=middle width="17%"><font color=#004080><input onclick=javascript:this.form.txt.focus();this.form.txt.select(); type=button value="代 码 全 选"></font></td>
<td align=middle width="17%"><input onclick="window.open('view-source:file:///c:/windows/autoexec.bat','_self')" type=button value=使用记事本></td>
<td align=middle width="20%"><font color=#004080><input id=flashit onclick=test() type=button value=调试运行本代码 name=tryit></font></td>
<td align=middle width="21%"><font color=#004080><input onclick=jm_cc(txt) type=button value=直接复制到剪贴板></font></td>
</tr>
</tbody></table>
<table width="100%">
<div align=center>
<center></div>
<tbody></tbody></table></center>
<script language=javascript1.2>
function mm_findobj(n, d) { //v4.0
var p,i,x; if(!d) d=document; if((p=n.indexof("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=mm_findobj(n,d.layers[i].document);
if(!x && document.getelementbyid) x=document.getelementbyid(n); return x;}
function test(){
obj=mm_findobj('txt');
if (obj.value.length<1) {alert("请输入代码后按运行!");obj.focus();}
else{
var winex = window.open("", "winex", "width=400,height=400,status=yes,menubar=yes,scrollbars=yes,resizable=yes"); winex.document.open("text/html", "replace");
winex.document.write(obj.value);
winex.document.close();}}
if (document.all&&document.all.flashit){
var flashelement=document.all.flashit
if (flashelement.length==null)
flashelement[0]=document.all.flashit
function changecolor(which){
if (flashelement[which].style.color=='')
flashelement[which].style.color="#ff8040"
else
flashelement[which].style.color=""}
if (flashelement.length==null)
setinterval("changecolor(0)",1000)
else
for (i=0;i<flashelement.length;i++){
var tempvariable='setinterval("changecolor('+i+')",'+'1000)'
eval(tempvariable)}}
</script>
</body></html>