checkbox(one check all check,one cancel all cancel)

<SCRIPT LANGUAGE="JavaScript">
<!--
function ctrla()
{
//alert("")

//document.all.cfile.checked=true;

 var e = fmfile.cfile;
  if (document.fmfile.cfileall.checked)
  {
  //alert("");
  for( var i = 0; i < e.length; i++ )
   e[i].checked=true;
   //alert("");}
  }
  else
  {
  for( var i = 0; i < e.length; i++ )
   e[i].checked=false;
  }
 
}
//-->
</SCRIPT>
/<form name=fmfile action=convert.asp ><input type=checkbox name=cfileall onclick=javascript:ctrla()><input type=checkbox name=cfile value=global.asa>global.asa
<BR><input type=checkbox name=cfile value=global.asa.bak>global.asa.bak
<BR><input type=checkbox name=cfile value=global.asa.bak.bak>global.asa.bak.bak
<BR><input type=checkbox name=cfile value=help.gif>help.gif
<BR><input type=checkbox name=cfile value=mmc.gif>mmc.gif
<BR><input type=checkbox name=cfile value=pagerror.gif>pagerror.gif
<BR><input type=checkbox name=cfile value=postinfo.html>postinfo.html
<BR><input type=checkbox name=cfile value=print.gif>print.gif
<BR><input type=checkbox name=cfile value=tt.asp>tt.asp
<BR><input type=checkbox name=cfile value=tt.asp.bak>tt.asp.bak
<BR><input type=checkbox name=cfile value=warning.gif>warning.gif
<BR><input type=checkbox name=cfile value=web.gif>web.gif
<BR><input type=checkbox name=cfile value=win2000.gif>win2000.gif
<BR><input type=checkbox name=cfile value=_vti_inf.html>_vti_inf.html
<BR><input type=submit name=action value=转换><input type=submit name=action value=删除></form><center><FORM METHOD=POST ACTION=dir.asp>请选择目录：<select NAME=dirm><option value=gudai>gudai</option><option value=aspnet_client>aspnet_client</option>
<option value=images>images</option>
<option value=WebService1>WebService1</option>
<option value=WebService2>WebService2</option>
<option value=_private>_private</option>
<option value=_vti_cnf>_vti_cnf</option>
<option value=_vti_log>_vti_log</option>
<option value=_vti_pvt>_vti_pvt</option>
<option value=_vti_script>_vti_script</option>
<option value=_vti_txt>_vti_txt</option>
</select><input type=hidden name=updirm value=/><INPUT TYPE=submit value=进入></form><a href='javascript:history.back(-1)'>返回</a></FORM>

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