Onsubmit功能不起作用

Onsubmit function not working

本文关键字：不起作用 功能 Onsubmit      更新时间：2023-09-26

我的onsubmit函数不工作。

我的PHP文件有两种形式。两个表单标记都有一个onsubmit属性，该属性链接到同一个javascript文件。第一个表单的提交正在工作。第二种形式调用的函数被简化为：

function UserDataCheck()
{
   return false;
}

表单标签为

form name='user_form' method='post' onsubmit='return UserDataCheck();'

此标记包含在<>中和双引号，并在PHP文件中进行回显。

请帮忙。这简直把我逼疯了！早些时候，我在UserDataCheck（）中进行了一些数据检查，但我去掉了所有这些，看看我是否可以使用onsubmit来阻止用户提交！没有成功。

这里有更多的代码！

 echo "<html>"; 
    echo "<head>"; 
    echo "<title>Survey Form</title>"; 
    echo "<link link rel='stylesheet' href='examples.css' type='text/css'>"; 
    echo "</head>";
echo "<script src='validation.js'></script>"; 
echo "<body topmargin='20', leftmargin='20', rightmargin='20', style='background-color:beige; font-family:calibri;'>"; 
echo "<img src='CSE Global.jpg' width='250' height='70' align='right' />";
//--------------------------------------------------------------------- 
// Firstly, we determine who is using this system 
// Check $_GET['dex'] for a value, if provided, then it's the user 
// if not, then it's the administrator (see my notes below the code for 
// more info) 
//--------------------------------------------------------------------- 
"<input type='text' name='dex' length='50'>";
"<input type='boolean' name='sub' length='1'>";
if ($_GET['dex']=="") {  
    //--------------------------------------------------------------------- 
    // $_GET['dex'] is empty so we can presume this is the Admin 
    //--------------------------------------------------------------------- 
    echo "<p style='font-family:cambria;font-size:35px;'> WELCOME ADMIN!</p>"; 

    //--------------------------------------------------------------------- 
    // We now check to see if the form has been submitted or not ... 
    // To do this, we check if the variable 'sub' is in the $_POST array 
    //--------------------------------------------------------------------- 
    if ($_POST['sub']!=1) { 
        //--------------------------------------------------------------------- 
        // The form has not been submitted already so present the "admin form" 
        //---------------------------------------------------------------------

// check that they entered an amount tested, an amount passed,
// and that they didn't pass units than they more than tested

        echo "<form name='admin_form' method='post' onsubmit='if(!AdminDataCheck()) return      false;'>"; 
        echo "<p><label>Scope of Service <label style='color:red'><strong>*</strong></label>    <br/></label> <input type='text' name='scope' length='50' id='ScopeofService' onblur='checkScopeofService()'/><label id='labelScopeofService'></label></p>";

接下来是更多的标签和文本字段。

然后表单标签就关闭了！

echo "<input type='hidden' name='dex' value={$dex}>"; 
            echo "<input type='hidden' name='sub' value=1>"; 
            echo "<input type='SUBMIT' style='background-color:white' name='submit' value='SUBMIT'>"; 
            echo "</form>";

以下是validation.js 中的函数

function AdminDataCheck()
{
var SoS = document.getElementById('ScopeofService').value;
var PNumber = document.getElementById('ProjectNumber').value;
var numericExp = /^[0-9]+$/;
var alphaExp = /^[A-Za-z ]+$/; 
var Email = document.getElementById('Email').value;
var emailExp = /^['w'-'.'+]+'@[a-zA-Z0-9'-]+'.[a-zA-z0-9]{2,4}$/;
if (!(SoS.match(alphaExp)))
{   
alert("Invalid Scope");
return false;
}
else if(!(PNumber.match(numericExp)))
{
alert("Invalid Project Number.");
return false;
}
else if(!(Email.match(emailExp)))
{
alert("Invalid Email.");
return false;
}
else
{
return true;
}
}

让我强调一下，这几分钟前就开始了，我没有做任何更改，只是重新启动了浏览器和服务器！它停止了工作。这真是令人沮丧！

试试这个：

onsubmit='if(!UserDataCheck()) return false;'
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