请问哪里出错?怎么改?
ekway 2003-08-21 08:04:34 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
<script language="javascript">
function check()
{
if(event.KeyCode>=33&&event.KeyCode<=47||event.KeyCode>=58&&event.KeyCode<=64||event.KeyCode>=91&&event.KeyCode<=96||event.KeyCode>=123&&event.KeyCode<=127)
{
alert("您输入非法字符!请重新输入。");
document.form.username.focus();
return false
else
return true
}
}
</script>
<form name="form">
<input name="username" type="text" onKeyDown="return check()">
</form>
</BODY>
</HTML>