问题：如果特定字段为空，我希望能够提醒用户。表单外观如下：
当用户输入邮政编码并选择搜索时，我希望显示一个弹出窗口来提醒用户选择距离而不显示结果。如果用户输入医院名称并且城市下拉列表，我不希望出现警报。仅在输入邮政编码和选择搜索按钮时。
形式如下：
<div class="panel panel-default">
<div class="panel-body">
<form name="UrgentCareSearch" ng-submit="SearchUrgentCare(searchParam);" novalidate role="form" onsubmit="return validateForm()">
<div class="form-group"><input class="form-control" id="hospital" ng-model="searchParam.HospitalName" placeholder="Hospital Name" type="text" /></div>
<div class="form-group">
<select class="form-control" id="city" ng-model="searchParam.City">
<option disabled="disabled" selected="selected" value="">City</option>
<option value=""></option>
<cfoutput query="HospCityFind">
<option value=#officecity#>#officecity#</option>
</cfoutput>
</select></div>
<hr />
<div style="margin-top:-10px; margin-bottom:10px; text-align:center; font-size:8pt! important"><strong>* OR Search by Zip code radius *</strong></div>
<div class="row">
<div class="col-xs-7 no-right-padding">
<div class="form-group">
<div class="input-group">
<select class="form-control" id="miles" name="distance" ng-model="searchParam.Distance">
<option></option><option >5</option><option>10</option><option>15</option><option>20</option>
</select>
<div class="input-group-addon">miles</div>
</div>
</div>
</div>
<div class="col-xs-5 no-left-padding widthZip">
<div class="form-group"><input allow-pattern="[\d\W]" class="form-control" id="zip" maxlength="5" ng-model="searchParam.Zip" placeholder="Zip code" type="text" /></div>
</div>
</div>
<div class="form-group"><input class="btn btn-warning btn-block" ng-click="gotoElement('SearchResultsAnchor');" type="submit" value="Search" /></div>
</form>
</div>
以下是当里程为空时发出警报的脚本：
function validateForm() {
var x = document.forms["UrgentCareSearch"]["distance"].value;
if (x == "" || x=="null") {
alert("Please select distance");
return false;
}
更新
我已经完成了以下操作，但仍然无法按我想要的方式工作（即在输入搜索按钮以及用户输入邮政编码时显示警报。这意味着一旦用户输入了邮政编码并单击在搜索按钮上填充结果时，警报将显示，通知您选择里程，并且直到用户输入了多少英里并再次单击搜索后，结果才会显示：
function validateForm() {
var x = document.forms["UrgentCareSearch"]["miles"].value;
var $zip = $('#zip');
if ((x == "" && $zip != "") ||(x=="null" && $zip != "")) {
alert("Please select distance");
return false;
}
这是我使用时所需要的：
<div class="panel panel-default">
<div class="panel-body">
<form name="UrgentCareSearch" ng-submit="SearchUrgentCare(searchParam);" novalidate role="form" onsubmit="return checkTextField()">
<div class="form-group"><input class="form-control" id="hospital" ng-model="searchParam.HospitalName" placeholder="Hospital Name" type="text" /></div>
<div class="form-group">
<select class="form-control" id="city" ng-model="searchParam.City">
<option disabled="disabled" selected="selected" value="">City</option>
<option value=""></option>
<cfoutput query="HospCityFind">
<option value=#officecity#>#officecity#</option>
</cfoutput>
</select></div>
<hr />
<div style="margin-top:-10px; margin-bottom:10px; text-align:center; font-size:8pt! important"><strong>* OR Search by Zip code radius *</strong></div>
<div class="row">
<div class="col-xs-7 no-right-padding">
<div class="form-group">
<div class="input-group">
<select class="form-control" id="miles" name="distance" ng-model="searchParam.Distance" ng-options="mile.value for mile in miles" required>
<option value=""></option><option >5</option><option>10</option><option>15</option><option>20</option>
</select>
<div class="input-group-addon">miles</div>
</div>
</div>
</div>
<div class="col-xs-5 no-left-padding widthZip">
<div class="form-group"><input allow-pattern="[\d\W]" class="form-control" id="zip" maxlength="5" ng-model="searchParam.Zip" placeholder="Zip code" type="text" /></div>
</div>
</div>
<div class="form-group"><input class="btn btn-warning btn-block" ng-click="gotoElement('SearchResultsAnchor');" type="submit" value="Search" /></div>
</form>
</div>
最佳答案
如果将每个required或input元素添加为select，则将其保留为空白将阻止提交表单
<div class="panel panel-default">
<div class="panel-body">
<form name="UrgentCareSearch" ng-submit="SearchUrgentCare(searchParam);" novalidate role="form" onsubmit="return validateForm()">
<div class="form-group"><input class="form-control" id="hospital" ng-model="searchParam.HospitalName" placeholder="Hospital Name" type="text" required /></div>
<div class="form-group">
<select class="form-control" id="city" ng-model="searchParam.City" required>
<option disabled="disabled" selected="selected" value="">City</option>
<option value=""></option>
<cfoutput query="HospCityFind">
<option value=#officecity#>#officecity#</option>
</cfoutput>
</select></div>
<hr />
<div style="margin-top:-10px; margin-bottom:10px; text-align:center; font-size:8pt! important"><strong>* OR Search by Zip code radius *</strong></div>
<div class="row">
<div class="col-xs-7 no-right-padding">
<div class="form-group">
<div class="input-group">
<select class="form-control" id="miles" name="distance" ng-model="searchParam.Distance" required>
<option></option><option >5</option><option>10</option><option>15</option><option>20</option>
</select>
<div class="input-group-addon">miles</div>
</div>
</div>
</div>
<div class="col-xs-5 no-left-padding widthZip">
<div class="form-group"><input allow-pattern="[\d\W]" class="form-control" id="zip" maxlength="5" ng-model="searchParam.Zip" placeholder="Zip code" type="text" /></div>
</div>
</div>
<div class="form-group"><input class="btn btn-warning btn-block" ng-click="gotoElement('SearchResultsAnchor');" type="submit" value="Search" /></div>
</form>或者可以
jquery触摸一下首先给您的表格一个
id让我们说myform$(document).ready(function()
{
$('#myform').submit(function()
{
var name = $("#hospital").val();
var name = $("#city").val();
if(name == "" || name == " ")
{
alert("Please enter name");
return false;
}
if(city == "" || city== " ")
{
alert("Please enter city");
return false;
}
//Just like this and at the end when you are satisfied
$(this).submit();
});
});
关于javascript - 警报用户字段为空，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/41751036/