提交表单时，怎么控制先进行JS验证，如果通过JS验证再连接服务器执行PHP语句呢？

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提交表单时，怎么控制先进行JS验证，如果通过JS验证再连接服务器执行PHP语句呢？,第1张

我把代码都写在一个文件里面 命名为 test.php 你可以测试一下 我只是写了个意思 具体的操作你可以自己再写我测试没问题了

<html>

<head>

<script type="text/javascript" src="update.js"></script>

<form action = "update.php" method = "POST">

</form>

</head>

<body>

<form action = "test.php" onsubmit="return my_check()" method = "POST">

<table>

<tr><td><label for = "id">文件号：</label></td><td><input type = "text" size="8" name = "id" id='my_id' /></td></tr>

<tr><td><label for = "user">姓名：</label></td><td><input type = "text" size = "8" name = "user" /></td></tr>

<tr><td><input type = "submit" name = "submit" value = "提交更新"/>

<input type = "hidden" name = "action" value = "add" />

<input type = "reset" name = "reset" value = "重新填写" /></td></tr>

</table>

</form>

</body>

</html>

<script language=javascript>

function my_check(){

var a = document.getElementById("my_id")

if(a.value==""){

alert ("文件号不能为空"+"\n"+"请加上")

a.focus()

return(false)

}

else{

return(true)

}

}

</script>

<?

$act = $_POST['action']

if($act == 'add'){

$id = $_POST['id']

echo "您输入了".$id

}

?>