help me,help me

注意不要把[;]写成[；]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>
<head>
<title>Untitled</title>
<meta http-equiv="Content-Type" content="text/html;charset=gb2312">
<script language="JavaScript">
function ShowConfirm()
{
 ;
 if(confirm("你知道了窗口的对象了吗"))setTimeout("self.close()",3000);
}
function ShowStatus()
{
window.status="欢迎你来到北京";
}
</script>
</head><body><form name="form1">
<input type="Button" name="button1" value="请点击我看confirm窗口" onclick="ShowConfirm()" onmousemove="ShowStatus()">
</form></body>
</html>