<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<script language="JavaScript">
<!--
function chkchr(){
var regexp=/^(?:19|2[0123])\d\d\-(?:0[1-9]|1[012])\-(?:0[1-9]|[12][0-9]|3[01])$/;
var re=regexp.test(form1.aa.value);
if(!re){
alert("日期不合法");
form1.aa.focus();
}else{
form1.submit();
}
}
//-->
</script>
</head>
<body>
<form name="form1" method="post" action="" onsubmit="chkchr();return false;">
<input name="aa" type="text" id="aa">
<input type="submit" name="Submit" value="提交">
</form>有效范围：1900-2399年，格式： 2003-08-06
</body>
</html>