谁能解释一下这段代码啊？
<html>
<head>
<script type="text/javascript">
function validate_required(field,alerttxt){with (field) { if (value==null||value=="") {alert(alerttxt);return false} else {return true} }}function validate_form(thisform){with (thisform) { if (validate_required(email,"Email must be filled out!")==false) {email.focus();return false} }}
</script>
</head>
<body>
<form action="submitpage.htm" method="post">
Email: <input type="text" name="email" size="30">
<input type="submit" value="Submit">
</form>
</body>
</html> |
收藏
淘帖
踩
