我對所需字段使用了javascript驗證。這裏是我的htmljavascript form validation
<form class="uk-form-stacked" name="myForm" action="<?php echo base_url(); ?>admin/pages/create_service" id="wizard_advanced_form" method="post" enctype="multipart/form-data" onsubmit="return myFunction(this)" novalidate>
<div data-uk-grid-margin="" class="uk-grid">
<div class="uk-width-medium-1-2">
<label for="service_title">Service Title<span class="req">*</span></label>
<input type="text" name="service_title" id="validd" class="md-input" />
<p id="demo"></p>
</div>
</div>
<div class="uk-grid">
<button type="submit" class="md-btn md-btn-primary md-btn-wave-light waves-effect waves-button waves-light" >Submit</button>
</div>
</form>
我的JavaScript
<script>
function myFunction(form) {
var x, text;
x = document.getElementById("validd").value;
if (x == null || x == "") {
text = "Input not valid";
}
document.getElementById("demo").innerHTML = text;
return false;
}
</script>
現在,當我輸入字段爲空,我提交的形式,它顯示我輸入無效是罰款。但即使當我填寫一些textin輸入,然後它顯示我未定義的輸入無效而不是提交表單。 請幫忙..
原因是安靜簡單,'variable'被定義爲'undefined','if'條件不滿足,則值保持'undefined' .. – Rayon