正则实现表单验证：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
function validateForm() {
var x = document.forms["myForm"]["fname"].value;
var pattern=/\S+/ //正则匹配空格等空白内容,限定符用*会出错，因为任意字串都会被匹配到
if (x == null || !pattern.test(x)) {
alert("需要输入名字。");
return false;
}
}
</script>
</head>
<body>
<form name="myForm" action="demo_form.php"
onsubmit="return validateForm()" method="post">
名字: <input type="text" name="fname">
<input type="submit" value="提交">
</form>
</body>
</html>
发表评论 取消回复