<html>
<head>
<title>注册 </title>
</head>
<body>
<script language="javascript">
<!--
function check()
{
function checkspace(checkstr)
{
dim str;
for(i=0;i <checkstr.length;i++)
str=str+' ';
return (str==checkstr);
}
if(checkspace(document.form1.username.value))
{document.form1.username.focus();
alert("用户名不能为空");
return false;
}
}
// -->
</script>
<form name="form1" method="post" action="register.htm">
<table width="780" height="337" border="0" align="center" bgcolor="#FFFFFF">
<tr>
<td width="142">用户名: </td>
<td width="646">
<input name="username" type="text" size="20" /> </td>
</tr>
<tr> <td>
<input onclick="check
