Javascript返回false，警告不起作用

Question

我試圖確保某些字段在我的表單中不留空白。它似乎很簡單，但由於某種原因，它不起作用。警報沒有顯示，並返回false不起作用（它繼續發佈到我的數據庫空白條目）請幫助，我做錯了什麼。謝謝！

腳本：

function check(){ 
var name = getElementById('name'); 
var date = getElementById('date'); 
var pri = getElementById('pri'); 
var asapc = getElementById('asapc'); 
var asapn = getElementById('asapn'); 
var obr = getElementById('obr'); 
var obc = getElementById('obc'); 
var obn = getElementById('obn'); 
    if (name.value == "" || date.value == "" || pri.value == "not" || asapc.value == "" || asapn.value == "" || obr.value == "" || obc.value == "" || obn.value == "") { 
    alert("One or more fields were not filled out."); 
    return false ; } 
    return true; 
} 

代碼：

<FORM ACTION="step2.php" METHOD="POST" onsubmit="check();"> 
<!-- fields here --> 
<INPUT TYPE="submit" VALUE="CONTINUE"> 

Answer 1

訪問每一個元素document.getElementById...和形式的標籤寫入該onsubmit="return check();"代替如果onsubmit="check();"

Answer 2

你缺少回報的位置：

<FORM ACTION="step2.php" METHOD="POST" onsubmit="return check();"> 

Answer 3

你缺少（文件），這是正確的語法：

document.getElementById('id'); 


<script> 
function check() { 
var name = document.getElementById('name'); 
var date = document.getElementById('date'); 
    if (name.value == "" || date.value == "") { 
     alert("One or more fields were not filled out."); 
     return false; 
    } 
} 
</script> 

和手段的getElementById通過ID不是我的標籤名

<FORM ACTION="step2.php" METHOD="POST" onsubmit="return check();"> 
    <input name="name" type="text" value="" id="name"> 
    <input name="date" type="text" value="" id="date"> 
    .....etc.. 
    <INPUT TYPE="submit" VALUE="CONTINUE"> 
</FORM>