Question

我有一个验证功能和一个重置功能，确认是否确认并且它们都不起作用。请帮忙。我已经尝试了更多引用html表单输入的方法，即getElementById（）函数，getElementByName（），document.form.inputElementName.value，document.forms [“formName”] [“inpuElementName”]。value。没有工作!!!!请帮忙！！！！它是一个类项目

Javascript：

      <script type=text/javascript>
     function validateInventory() {
    var imei_no = document.form.imei_no.value;
    var phone_name = document.form.phone_name.value;
    var phone_storage = document.form.phone_storage.value;
    var phone_color = document.form.phone_color.value;
    var phone_buyingprice = document.form.phone_buyingprice.value;
var valid = true;

    if (imei_no.value.length > 15 || imei_no.value.length <= 0||imei_no) {
        alert("Invalid No. of digits in IMEI");
        form.imei_no.focus();
        valid = false;

    } else {
        if (isNaN(imei_no) == true
                || isNaN(phone_buyingprice) == true) {
            alert("Please enter number value in IMEI/Buying Price!");
            imei_no.focus();
            phone_buyingprice.focus();
            valid = false;
        } else if (imei_no = null ||imei_no = 0 || phone_name_value == ""
                || phone_storage_value == "" || phone_color_value == ""
                || phone_buyingprice_value == 0|| phone_buyingprice_value == null) {
            alert("Some entries are empty. Please recheck your Input");
            valid = false;
        }
    }
    var cofirmInput= window.confirm("Is your Input correct?");
    if(confirmInput==true){
        alert("Input succesful!!!");
        return valid; 
    }else{
        valid=false;
    }

};
function resetInventory() {
    var resetForm = window
            .confirm("Are you sure you want to reset the form?");
    if (resetForm == true) {
        alert("Reset Successful!!!");
        return true;
    }else{
        return false;
        };
};

这是我的JSP中的HTML表单：

<form action=# method=post name=InventoryForm id=InventoryForm
                onreset="return resetInventory()"
                onsubmit="return validateInventory()">
                <table border="1" cellpadding="5" id=InventoryFormTable>
                    <tr>
                        <th>IMEI NO</th>
                        <th>PHONE NAME</th>
                        <th>PHONE STORAGE</th>
                        <th>PHONE COLOR</th>
                        <th>PHONE BUYING PRICE</th>
                    </tr>
                    <tr>
                        <td><input type=text name=imei_no id=imei_no></td>
                        <td><select name=phone_name id=phone_name>
                                <option value=""></option>
                                <option value="iPhone X">iPhone X</option>
                                <option value="iPhone 8">iPhone 8</option>
                                <option value="iPhone 8 Plus">iPhone 8Plus</option>
                                <option value="iPhone 7">iPhone 7</option>
                                <option value="iPhone 7 Plus">iPhone 7Plus</option>
                                <option value="iPhone SE">iPhone SE</option>
                                <option value="iPhone 6">iPhone 6</option>
                                <option value="iPhone 6 Plus">iPhone 6Plus</option>
                                <option value="iPhone 6s">iPhone 6s</option>
                                <option value="iPhone 6s Plus">iPhone 6sPlus</option>
                                <option value="iPhone 5">iPhone 5</option>
                                <option value="iPhone 5s">iPhone 5s</option>
                                <option value="iPhone 5c">iPhone 5c</option>
                                <option value="iPhone 4">iPhone 4</option>
                                <option value="iPhone 4s">iPhone 4s</option>
                                <option value="iPhone 3G">iPhone 3G</option>
                                <option value="iPhone 3GS">iPhone 3GS</option>
                        </select></td>
                        <td><select name=phone_storage id=phone_storage>
                                <option value=""></option>
                                <option value=16GB>16 GB</option>
                                <option value=3216GB>32 GB</option>
                                <option value=64GB>64 GB</option>
                                <option value=128GB>128 GB</option>
                                <option value=256GB>256 GB</option>
                        </select></td>
                        <td><input type=text name=phone_color id=phone_color></td>
                        <td><input type=text name=phone_buyingingprice
                            id=phone_buyingingprice></td>
                    </tr>

                    <tr>
                        <td colspan=6><div class=button>
                                <input type=submit id=submit value=submit>
                                &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <input type=reset
                                    id=reset value=reset>
                            </div></td>
                    </tr>
                </table>




            </form>

Answer 1

这就是你通常获得价值的方式。

HTML：

<input type="text" name="something" id="somethingID" value="value" />

JS：

var somethingValue = document.getElementById("somethingID").value;

但是，如果您特别想要提交表单时的值，可以通过添加一些简单的JQuery轻松获取它，这是我之前在我的项目中使用的

HTML：

<form id="firstForm" action="actionpage.php" method="POST" >
    <textarea name="userInput" id="userTextArea"></textarea>
    <select id="userOptions">//dynamically filled</select>
    <input type="submit" value="Input user" />
</form>

JQuery的：

function testFunction() {
$('#firstForm').submit(function() {
   var user = $('#userInput').val();
   alert(user);
});
}

JSP Javascript验证功能和重置功能不起作用

1 个答案: